Jeremy Affeldt tweaked his right calf muscle in the ninth inning of Tuesday night's loss to the Padres. Affeldt was able to complete the inning, but said after the game that his calf "grabbed at him." He's hopeful that it's just a cramp, but we should know something more definitive Wednesday. The 32-year-old southpaw has a 3.11 ERA and 33/14 K/BB ratio over 37 2/3 innings this season.