There is always a risk when it comes to playing in the WBC as opposed to just participating in spring training especially for pitchers. However, I never felt a huge concern when it came to Pettitte for the simple reason that he’s an older veteran who knows his body well and what he needs to do to prepare for the season.
It’s better to be safe than sorry though and this is really for the best considering Pettitte hasn’t pitched in a full season since 2010. The Yankees didn’t want him to participate and although they can’t block him from playing without an injury, but it couldn’t have hurt if they simply reminded him that it’s been a while since he’s had a normal spring.
As for the rest, there is no major concern involved with position players participating. Perhaps it’ll even help Teixeira avoid his typical slow start by playing in meaningful games early. While there is no concern with Cervelli, I’m not sure what he’s thinking considering he’s battling for a starting spot. Not being in camp can’t really help his chances.