The knee problem became a factor as early as 2009.
Over the past three years, he's made improvements in his strikeout rate - if he can carry that success over into this year, he could improve on his.
His rehab has been put on hold and he has already lost 15 pounds, so it's going to be a while before we see him back in the major leagues.
Crisp has hit safely in each of his last four games, including a leadoff homer in Wednesday's loss to the Red Sox.
Despite suffering from pneumonia, Guthrie has posted a 3.
A season ago, he was quietly effective in the second half, posting a 3.