The San Francisco Giants placed shortstop Thairo Estrada on the 7-day concussion IL on Sunday while also trading for Chicago Cubs minor league shortstop Dixon Machado.

Estrada, 26, was hit in the helmet by a pitch from Mark Leiter Jr. in the fifth inning of Saturday's win by the Giants and had to be helped off the field. With Brandon Crawford out of the lineup with a knee injury, the Giants were in need of a shortstop.

Machado, 30, was hitting .312 with a .402 on-base percentage for Triple-A Iowa and will start for the Giants against the Cubs on Sunday night.