DR HQ: Anatomy 101— Flexor Mass Injuries to the Forearm
May 8 2013
In the past week, we’ve heard about Stephen Strasburg (RHP, WAS) battling tightness in the flexor mass (also known as flexor pronator muscle group) in his forearm. Gavin Floyd (RHP, CHW) will undergo surgery to repair damage to his flexor mass tendon AND have Tommy John surgery. (More on Floyd later). The Orioles’ Dylan Bundy had a PRP treatment involving his flexor mass and was told to shut it down for up to six weeks. This injury is all over the news, so let's take a look at this little discussed ailment.
Anatomy:
The Livestrong.com website does a great job of explaining the anatomy of the flexor mass…
"The flexor mass muscles are also known as the lateral and medial epicondyle muscles. This muscle massextends from the elbow down...
Almost!
You’re just a few clicks away from accessing this feature and hundreds more throughout the year that have a singular goal in mind: Winning your league. Subscribe to BaseballHQ.com here!
Already a subscriber? Sign in here
More From The Big Hurt
Yordan Alvarez and Shohei Ohtani both hurt, just as you're heading down the stretch. Is there hope?
Sep 12 2026 3:05am
Sep 12 2026 3:05am
Several new injuries. Only one or two are more than mild, but any of them could potentially last to the end of the season.
Sep 7 2026 3:06am
Sep 7 2026 3:06am
Aug 31 2026 3:03am
We're at the point in the season where pretty much any injury can be season-ending. Case in point...
Aug 24 2026 3:03am
Aug 24 2026 3:03am
Hamstrings, obliques, and a trunks. It was a busy weekend for muscle strains.
Aug 17 2026 3:03am
Aug 17 2026 3:03am
