CHICAGO — Star first baseman Anthony Rizzo was pulled from a game Sunday with a sprained right ankle, putting a damper on the Chicago Cubs' 16-6 victory over the Pittsburgh Pirates that completed a three-game sweep.

Rizzo was injured fielding a bunt at first base, had to be helped off the field and could not put pressure on the leg. X-rays taken at Wrigley Field showed no fractures. He'll get an MRI on Monday.

Chicago's post-season pursuit has already been hindered by an injury to shortstop Javier Báez, who is out for the rest of the regular season with a hairline fracture of his left thumb.

The Cubs maintained their one-game lead over Milwaukee for the second NL wild card.

Kris Bryant homered twice, and Ian Happ, Kyle Schwarber and Jonathan Lucroy also connected for the Cubs, who outscored the Pirates 47-15 in the series.

Brad Wieck (1-1) struck out both batters he faced. Trevor Williams (7-7) allowed seven runs in 2 1/3 innings.