CHICAGO -

The Arizona Diamondbacks have lost their biggest stick for the foreseeable future.

Outfielder Mark Trumbo was placed on the 15-day disabled list on Thursday, retroactive to Tuesday, after a sore left foot turned out to be a stress fracture.

Trumbo was tied for tops in the National League in homers (seven) and second in RBIs (19).

He hit his seventh homer Monday in the series opener against the Chicago Cubs but missed the next two games before the move to the disabled list Thursday.

"He hit the home run and ran around the bases and, as he was running off the field, he noticed his foot was sore," manager Kirk Gibson said after the injury occurred.

Outfielder Roger Kieschnick was called up from Triple-A Reno as a replacement.

The 27-year-old was batting .281 with five doubles, three homers and eight RBIs in 18 games with Reno. He was claimed off waivers from the San Francisco Giants on April 4.

He appeared in 28 games with the Giants in 2013, hitting .202 with a triple and RBI. In 101 games with Triple-A Fresno, Kieschnick batted .273 with 27 doubles, nine triples, 13 home runs and 56 RBI.