CINCINNATI -- Nick Senzel (right hamstring) did not start for the fourth straight game on Sunday. After missing Thursday and Friday’s games, Senzel entered Saturday's 3-2 Reds victory as a pinch-runner and played an inning in center field.

“We’re going to give it one more day just to be sure, with the heat and a day game,” Reds manager David Bell said. “He wants to play so bad.”

Senzel appeared off the bench again Sunday, grounding out as a pinch-hitter in the ninth inning. The rookie center fielder left Wednesday’s game vs. the Cubs with hamstring tightness.

Raisel returns

One day after being activated from the paternity list, Reds closer Raisel Iglesias officially returned Sunday morning.

The Reds played with a 24-man roster Saturday as Iglesias was unable to rejoin the team. He arrived in the clubhouse roughly two hours before first pitch and received congratulations from many of his teammates.

Iglesias came on to pitch the ninth inning on Sunday, appearing for the first time since July 16. He gave up a home run to Yairo Munoz, and also struck out two batters.

“We wanted to get him in there after four days off,” Bell said after Sunday’s game. “It wasn’t absolutely necessary, but it was still a close game and we wanted him to get in there and get some work before the Milwaukee series.”

Mahle throws side session

Reds starter Tyler Mahle is dealing with hamstring tightness after his start Friday against the Cardinals, and his status for his next outing Wednesday in Milwaukee remains in question.

Bell said Mahle would throw a side session prior to Sunday’s game. Lucas Sims, who struck out nine and allowed four runs over 7 1/3 innings in a spot start on May 28, is an option to start in Mahle’s stead even if he pitches out of the bullpen on Sunday, according to Bell.