An MRI revealed Ruiz has a partial tear. He is expected to miss four to six weeks. Infielder Hector Luna was called up from Triple-A Lehigh Valley before Saturday's game against Arizona.
Ruiz was hitting .335 with 14 homers and 58 RBIs. All were career highs for the 33-year-old veteran.
Luna batted .246 with two homers and 10 RBIs in 26 games for Philadelphia previously this season.