I've been using a website to get my tickets to Red Sox games that offer the tickets at half price. I've used it quite a few times already without any problems. All the MLB teams offer discounts through the website from 33% off up to 50% off tickets depending on the team.
To use the website you have to be currently serving in the military,a veteran or a first responder.
They haven't gotten all the discounts for teams ready yet. Right now it's just Pittsburgh at up to 50% off tickets and Atlanta at 33% off tickets with the rest of the teams soon to follow.
They also offer discounts for other events like College and NBA basketball,NHL and WWE,etc.. I've never used anything but MLB tickets so I don't know what type of discount they offer.
Here's the link:
https://www.govx.com/tickets/categories/1000/mlb
I'm sorry if I posted this in the wrong area.