Jason Heyward was injured Saturday in this scary collision at third base [VIDEO].
Today, the Cubs placed Heyward on the 7-day concussion injured list, retroactive to Sunday, and brought up outfielder Trayce Thompson from Triple-A Iowa. To make room on the 40-man roster for Thompson, outfielder Michael Hermosillo was transferred to the 60-day injured list.
Thompson is 30 and was acquired from the Diamondbacks May 11 for a cash consideration and in 98 games for Iowa has hit .233/.344/.492 (71-for-305) with 14 doubles, one triple, 21 home runs, 63 RBI and 45 walks.