July 27, 2011
Keeping Up with the Jones
Chipper Jones, ATL (Right quadriceps strain) [AGL: 4 (27DL), ATD: -.008 (+.038DL)] (Explanation)
Coming back in two weeks following knee surgery, even a relatively simple procedure like partial meniscectomy, is pushing it. The quadriceps reflexively shuts down with swelling inside the knee joint, which occurs with almost all knee surgeries. This makes the quad more prone to injury. Even with physical therapy beginning the day after surgery, it takes time before the quad returns to normal and all the swelling inside the knee joint resolves. The nervous system also needs to recover, and the muscles have to learn how to accept the impulses coming from the nerves.
Of course, Chipper is going to do what Chipper wants to do. Even though he wasn't in the starting lineup, he was able to enter as a pinch-hitter later in last night's game. He might pinch-hit or leave early in the next several games.
Josh Johnson, FLO (Right shoulder inflammation) [AGL: 38, ATD: -.036]
Jason Giambi, COL (Left quadriceps strain) [AGL: 27, ATD: +.040]
The large muscle groups of the lower extremity have a tendency to suffer recurrent strains, in part due to the sheer size and number of fibers. When the muscle voluntarily contracts, not all of the muscle fibers contract at once. Some are held in reserve in order to help if some fibers become fatigued or if there is an unexpected additional force applied. Throughout rehabilitation, the truly injured fibers may not be significantly stressed, because all of the other fibers take up the slack. When the player gets into a live game and is forced to use the muscle without any thought or hesitation, those injured fibers can be pushed too far again, resulting in a recurrent strain.
Giambi was placed on the disabled list on Tuesday, so he will definitely be out of commission for at least a few weeks.
Kevin Youkilis, BOS (Right hamstring tightness) [AGL: 1 (23DL), ATD: -.017 (+.018)]
Lance Berkman, STL (Right rotator cuff strain) [AGL: 4 (14DL), ATD: +.060 (+.012)]
When this occurs, the rotator cuff muscles can strain as they try to stabilize the head of the humerus. Ligament and labrum damage can also occur. A reasonable comp for a subluxation is Richie Sexson, who ended up needing surgery but also suffered a more severe injury initially. Berkman was already back in the lineup yesterday but was taken out in the fifth inning with a reaggrevation of the shoulder. He will be evaluated today with the possibility of a cortisone injection, which would cause him to miss a few games.
Flesh Wounds: Dan Haren returned from back stiffness to dominate the Indians on Monday... Luke Scott underwent labrum surgery performed by Dr. Andrews yesterday... Gaby Sanchez was out of the lineup yesterday with a tight hamstring... Joe Blanton is dealing with nerve damage in his elbow. No word on how much longer he will be out, but returns from this injury can be slow... Tim Lincecum missed yesterday's start with the flu, and Kerry Wood is battling a case of his own...Tony Pena may undergo Tommy John surgery... Daric Barton has been diagnosed with a torn labrum in his right shoulder and will meet with Dr. Yocum... Jose Bautista was hit in the earflap yesterday and was removed from the game. He didn't exhibit any concussion-like symptoms, and he's listed as day-to-day... Brian McCann strained his left oblique and will be placed on the disabled list today.... Dustin Moseley injured his left shoulder on a swing last night. This is the same shoulder that suffered the subluxation back in June.
Corey Dawkins is an author of Baseball Prospectus. Follow @CoreyDawkinsBP