What It Means:

Anderson tweaked his back while fielding a bunt on Saturday. The left-hander stayed in to face five more batters but allowed hits to four of them and eventually called for a trainer. Anderson has a long history of back issues and hasn't looked right all year. Eddie Butler and Mike Montgomery are the top candidates to take over Anderson's soon-to-be-vacant rotation spot.

Health is never assumed for Anderson, thus our algorithms project him for a 5.45 ERA, 11.4 percent strikeout rate, and 7.6 percent walk rate over 71 more innings pitched this season.