CINCINNATI -- Reds third baseman Edwin Encarnacion was placed on the 15-day disabled list on Tuesday with a small chip fracture in his left wrist. Infielder Adam Rosales was recalled from Triple-A Louisville.

It was believed that Encarnacion suffered the injury during a swing in his final plate appearance on Monday vs. the Astros. An MRI exam on Tuesday afternoon confirmed the fracture. He will be in a cast for one week before being reevaluated.

"You never know until you do extensive tests," Reds manager Dusty Baker said. "We don't know if he did it on the last swing yesterday or before. I know I saw him wince after his last at-bat."

Jerry Hairston Jr. started at third base for Cincinnati on Tuesday, after Encarnacion was scratched from the starting lineup to be examined by Reds medical director Dr. Tim Kremchek. Encarnacion has also been bothered by a sore right shoulder since Spring Training.

That might be the root of why Encarnacion has struggled all season. He is batting .127 with one home run and six RBIs. Although he leads the club in walks with 13, he was mired in a 0-for-12 streak and was also 1-for-his-past 28.

On the opposite end of the spectrum, Rosales is one of the hottest hitters in the Minor Leagues. In 17 games for Louisville, he was batting .431 with four home runs and 15 RBIs. He had two hits on Tuesday in an afternoon game vs. Indianapolis to extend his hitting streak to 11 games. He has reached base safely in all 17 games this season.