Victor Martinez (knee) began a running program Friday.
"Victor is not running at full speed, but he is running very well," said Tigers head athletic trainer Kevin Rand. V-Mart is doing low-volume work right now, but will progress to higher-volume work in time. The Tigers plan to take it easy with him during spring training, but the expectation is that he'll be ready on Opening Day. While Martinez is poised to serve as the club's primary DH in 2013, he still holds significant fantasy value because of his catcher-eligibility.