Originally written on MLB Injury News  |  Last updated 10/3/14
Another player has hit the 7-day DL this week.  The Oakland A's have placed catcher John Jaso on the DL with a concussion.  Jaso was undergoing tests over the last couple days to determine whether he was healthy enough to play - this is MLB protocol when a potential concussion exists - and he did not pass the test.  The A's decided it best to utilize the relatively new 7-day DL for concussions. Jane Lee of MLB.com says Jaso took foul tips off his mask in back-to-back days and had begun experiencing concussion-like symptoms.  This is when the team started running tests.  Although general tests came back normal, Jaso was experiencing dizziness and did not feel like himself.  Concussions do not always show up on CT scans, so teams must trust their player to tell them what's going on.  Jaso did so. “My brain might like the rest, but at the same time I want to play,” Jaso said before boarding the team charter. “I feel good right now. I feel like I’m working really good at-bats, so it’s definitely not a time I’d want to rest or whatever. A lot of it will have to do with the trainer and what he feels is best.” In that one quote, Jaso hits on exactly what makes concussions difficult to diagnose and treat.  He acknowledges something is wrong, but the pull of a hot streak and the game he loves makes him want to continue playing.  Fortunately, the A's recognized that regardless of the fact that most tests came back clean, Jaso needed to hit the DL. He will spend a week allowing his head to clear, then he can return to action.  The first-place A's will continue fighting to hold off the Texas Rangers without Jaso, but they will miss his bat of late.  In his last week, Jaso is hitting .300 with a home run, an RBI, and a run-scored.  Overall this season, he is hitting .271/.387/.372. Follow @mlbinjurynews Looking for fantasy baseball advice?

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