Left-handed pitcher Cesar Jimenez had his contract selected from Triple-A Lehigh Valley in a corresponding roster move.
Lee left his start Thursday against the Washington Nationals in the bottom of the third inning after just 31 pitches. He motioned toward his elbow before leaving the field with a trainer.
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Lee, 35, was making his third start since returning from a two-month stint on the disabled list with a strain in his left elbow.
The pitcher will be examined by a doctor Friday and will undergo further tests when the team returns home, according to the Philadelphia Daily News. Lee is 4-5 with a 3.65 ERA for Philadelphia this season.
- Scooby Axson