Manager Kevin Cash said Díaz had been experiencing groin tightness recently and was headed for an MRI on Monday's off-day ahead of a three-game series at Citi Field against the Mets.
Díaz extended his hitting streak to 12 games with a leadoff double and took third on a groundout by Wander Franco. As he advanced, Díaz slipped running past the bag but stayed in and scored on a Brandon Lowe groundout.
“Pretty much going into this base I felt it in there,” Diaz said through a translator. “I felt a little pull there when I slipped on top of the base.”
After the Rays batted, Díaz was replaced by Issac Paredes, who was hit near the elbow in consecutive plate appearances.
Diaz, who has led off in 38 games this year, tops leadoff hitters with a .321 average to go along with 10 homers and 24 RBIs.