Justin Verlander underwent successful core muscle repair surgery this morning. Verlander will "undergo physical rehabilitation for the next six weeks and will be reevaluated at the end of that time.

An out of nowhere situation for Verlander who wasn't known to be suffering any ailments that required surgery. The Tigers' Twitter feed is reporting that Verlander will have physical therapy for the next six weeks, but there is a reasonable expectation that he will be ready to rock by the time the season starts. Of course, six weeks out puts him well behind others so it might be a challenge for him to build up enough arm strength to be able to go early in the year. Coming off a relatively down season, this injury all but assures that Verlander should be dropped in your rankings - at least until we get more clarity on where his body is at.ANALYST: Ray Flowers Verlander suffered the injury at the end of December while participating in an offseason conditioning program. Tigers general manager Dave Dombrowski released a statement saying, We fully anticipate Justin to participate in spring training and be in a position to compete at the beginning of the 2014 season. This is just another red flag for an ace who showed signs this past season that his large workload, a MLB high of 932 innings pitched between 2010-2013, not to mention his willingness to rear back and throw 100 mph late in games, may have finally begun to catch up to him.ANALYST: Michael Pichan