Frequently Asked Questions

DMB Frequently Asked Questions

 Q:  Am I able to use my old season disks with version 11?

Yes. We have always had the commitment to maintain your investment in season disks purchased from Diamond Mind. Every new version of the game includes a feature that converts season disks from older formats to the format used by the new version.

For version 11, any season disks that are in version 8, 9, or 10 format are automatically converted to the format used for version 11 when you first install them.

NOTE: If you have season disks in formats older than version 8, one option is to use your earlier version of DMB to convert them to version 8 first, then use version 11 to convert them the rest of the way.

We periodically upgrade our older season disks to add new players, add new statistics, add real-life transactions and lineups, and take advantage of new game features. If you own older seasons, you may be eligible for discounted upgrades to those seasons. See Season Disk Upgrades for details.


 Q.  What are the system requirements?

By today's standards, the system requirements are quite modest. DMB runs on Windows-compatible computers that are equipped as follows: 

  • Windows 7, Windows 8, or Windows 10 (32-bit or 64-bit).
  • 800 x 600 or higher resolution 
  • 30 MB of hard disk space plus a minimum of 2-3 MB for each season disk, which includes the space needed for full year-to-date statistics for all teams and players. You may need as much as 40 MB for a season disk if you turn on all of the options to save game-by-game stats, boxscores, scoresheets, and game logs. An additional 75 MB may be needed if you choose to generate a website containing all possible reports for a large league. 
  • an active account with an Internet Service Provider (optional, needed only if you want to use the NetPlay feature to play head-to-head over the internet)


Q. Am I able to play Version 11 over the Internet?

Yes. Built-in support for head-to-head play over the internet is a major feature of version 11. We don't provide access to the internet, however, so you'll need to have an active account with an Internet Service Provider to use this feature. For more information, see NetPlay.


Q. I'm in the middle of a season replay. Can I switch to version 11 before the season is over, and will I lose any information if I do?

Yes, you can upgrade during a season, and with one exception, version 11 converts all of the information compiled by the previous version, including statistics, transactions, injury reports, boxscores and scoresheets.

The exception involves unscheduled league games, which were supported in versions 1 through 7. Because many DMB features are date-based (weather, transaction processing, date-interval-based reports, and so on), it is no longer possible to play unscheduled league games. (You can still play exhibition games outside of a league context.) If you played a season using version 7 or prior without first creating a schedule, the real-life stats and ratings will convert successfully, but you will lose some of the information related to your DMB season in progress.


Q. I'm playing in a league that uses Diamond Mind Baseball. If some managers in our league upgrade to version 11, and some stay with the older version, can we still exchange statistics?

No, it is not possible to transfer stats, rosters and manager profiles between different versions of the game. That means your league needs to decide whether to stay with the older version or have all league members upgrade to version 11 before your next season starts. Your league can convert in mid-season if every league member converts to version 11 at the same time.


Q. What park images are available? Will you be doing park images for old-time stadiums?

Version 11 includes diagrams for all of the parks that have been used since 1972 and a sampling of parks from prior to 1972. We plan to continue adding diagrams for older parks. New park images are made available for free download via our Ballpark Images page.


Q. Is there a downloadable demo version of the game?

Sorry, we don't have a demo version available. We strongly suggest that you review all of the information available in our About the Game section for details on Diamond Mind Baseball



Pricing, Ordering, Order Processing, Shipping, Replacement Software

Q. How much does version 11 cost?

Version 11 is now available at the new lower price of just $29.95. (Previous owners of any DMB game version, contact DMB Info at for a $5.00 discount code)


Q. What are the shipping options?

We no longer offer "hard" (CD) copies of our products. Our products are sold via download only.


Q. What versions of Diamond Mind Baseball are available and supported?

Versions 11 and Version 10 are supported.  However, DMB V10 is no longer offered for sale.


Q. Do you offer discounts for large orders?

We offer a 10% discount for orders over $100, a 20% discount on orders over $200, and a 30% discount on orders over $300. These discounts will not apply to specially-price complete sets of season or team collections.

These discounts apply to products for use by a single customer. They do not apply to orders covering more than one person. For example, a league commissioner cannot earn a 30% discount by placing an order for 24 copies of the current Season Disk for league members.

Please contact us at before placing your order to request a discount code or check out this blog post to view the codes for the various discount levels.


Q. Can I download my order immediately from your website?

Yes, the moment you submit your order and your payment has been accepted you can download the products you purchased.


Q. What is your refund policy?

We believe Diamond Mind is the most statistically-realistic baseball simulation, and we stand by our products. However, because there is no way to "return" digital products such as downloaded software, any refunds are on the honor system. Unfortunately, some individuals started to abuse our guarantee policy by downloading hundreds of dollars worth of software then immediately asking for a refund. As a result, we now offer a 30-day money-back guarantee on the Diamond Mind Baseball Game software only. This guarantee DOES NOT apply to season databases and other companion products.


Q. How can I view my order history?

A: Log in to "My Account" to view your order history. Click on an order number for more details about a specific order. Please note that only orders placed since our new online store opened in February 2015 will be displayed.

Q: What if I need help with a product I purchased from you?

We provide free customer support via email to all registered owners of Diamond Mind Baseball and related products.  Please allow us 24 hours to return your message.

You can contact us by using the Contact DMB link found near the bottom right of our website or by sending an email to one of the following email addresses:

For general inquiries:

For technical support: 

We understand that email is not the preferred way of receiving support for some people, but it is the most efficient way for us to communicate with customers.  Since we do not offer technical support over the phone, we do not maintain a phone line with which to contact customers.  This helps keep our costs down so that we may offer you better value for your money.


Q.  I have some old season disks from the PTP days that you have improved. Do I have to buy them again?

Yes, we're afraid so. We do offer special upgrade prices to registered owners of season disks that were purchased directly from Diamond Mind since the company was formed in September 1995. However, we are unable to do the same for those who bought season disks from PTP or other sources prior to that date.


Q. Can I back up my seasons?

Yes. We encourage our customers to make backups of all their Diamond Mind software products. For example, by saving your game and season installation files to an external drive of some kind, such as a USB stick. Or you can upload your files to a cloud storage account (for example, Dropbox, OneDrive, Google Drive).


Q.  My computer crashed - do I have to buy everything again?

Diamond Mind's policy on previously purchased software has changed. We now offer replacement files at the discounted price of $3 each. However, it's not usually necessary to download your DMB files more than once since there is no limit on the number of times you can use your original files to install the game or any of your seasons on one or on multiple computers for your personal use. 

Each Diamond Mind purchase includes a limited number of available downloads, so to avoid replacement charges, please be sure to make a backup of all of your Diamond Mind software as soon as possible after downloading your files.

If you cannot find your original game or database installation files and you do not have a backup, you can contact us at to request replacement files at the discounted price.

Q.  Is my account information secure?

We are committed to protecting your privacy. Diamond Mind Baseball does not sell, trade or rent your personal information to others. 


Q. Where can I get player pictures to upload?

Due to copyright and trademark laws, we cannot provide pictures that contain player images or team logos or other copyrighted images, nor can we direct you to any repositories or databases of player images that may exist or that DMB customers may have. You may upload any picture or image to represent or symbolize a player, and any such use may be allowable under “Fair Use” and other legal concepts of non-commercial use.  As a commercial entity, however, we cannot provide them.


Season Database Questions

Q. Do I need to order the Historical Ballpark Database to use your past seasons?

In most cases, no. Every past season includes all of the ballpark information you need to play realistic games with the teams from that season.

The Historical Ballpark Database has two roles. First, if you want to create a fantasy league of your own using some historical parks that you don't already have in your season database collection, you can import parks from the historical database and use them in your league.

Second, if you wish to use DMB's player-creation feature, you can reference the park effects data in this database so your players will be created on a park-adjusted basis. (That's how we create players.)


Q. Can I play games among teams from different seasons?

Yes, you can do just about anything you want using standard features of the Diamond Mind Baseball game.

When you play an exhibition game, you can choose the teams, the ballpark, and the era from any season that you have installed.

If you want to set up a league using teams, parks, and players from different seasons, you can do that, too. Just open the DMB Organizer window and click on the Import button to gather the things you want into a single database. After you've done that, you can organize those teams into a league and assign home parks to those teams, release all players into free agency and run a draft, generate a new schedule for your league, and so on.


Q. How do park images fit in?

For three reasons, we do not include park images with past seasons.

First, many of the images you need are installed automatically when you install the Diamond Mind Baseball game, and the ones you don't have can be downloaded free of charge from our website (assuming those images exist).

Second, most parks don't change from year to year, so it would waste space to store the same image over and over again.

Finally, park image files would increase the size of a season file by a factor of ten (e.g. from about 500KB to about 6MB for the 2001 Season).


Q. How do you do park adjustments for combined players?

If a player appeared on more than one team in a given season, we create one player record for each of his teams and one combined record that captures his overall performance for that season. The event table in each of his team-specific records is park-adjusted based on that team's home park. The event table in his combined record is a weighted average of those team-specific event tables, with the weights based on how much he played for each team.


Q. What are your future plans for expanding and/or improving your past season database collection?

We plan to continue releasing our Annual Season Database in December of each year. We will also continue to release Dan Szymborski's ZiPS Projection Database around the beginning weeks of each season.

A non-profit organization called Retrosheet is doing an amazing job of compiling (and validating) play-by-play data for historical seasons. We used their data to create our 1972 through 1983 Deluxe Past Seasons. Retrosheet recently released data for some seasons from the 1940s to the1970s, and we will convert those seasons from the Classic category to the Deluxe category at some point in the future.

We will continue to work on upgrades to some of our existing Classic Past Seasons, and we will release those upgrades as they are completed.

The addition of new Classic Past Seasons from the pre-1926 period remains a much lower priority. It's clear from our sales records that our customers are much more interested in the years since World War II than they are in older seasons. We always try to spend our time on the projects that we think will provide the most benefit to the most customers, so we're focusing on the other projects just mentioned for the time being.


Technical Support Questions

Q. How do I install a season database?

Once your season installation file has been downloaded and saved to your computer, it can be installed by using the game's built-in Install season disk command from the File menu. You can find step-by-step instructions in Diamond Mind's built-in help system or on the DMB community forum.

To access the instructions in the game's help system, click Help on the main menu bar and then click Help Topics. From the help contents, double-click "Managing DMB Databases" and then click "Installing a Season Disk".

Or you can view the following topic on our community forum.

How to install a DMB season database


Q. How do I install the game?

You can find step-by-step instructions in the following topic on our community forum.

How to install Diamond Mind Baseball