MLB Game Summary - Colorado at Chicago Cubs

Mesa, AZ (SportsNetwork.com) - Starting pitcher Jake Arrieta's three-run homer led a seven-run first inning that catapulted the Chicago Cubs to an 18-4 win over the Colorado Rockies on Saturday in spring training.

Rockies starter Jon Gray gave up all seven runs in the first inning while retiring just two batters before he was taken out.

Arrieta went four scoreless innings, giving up three hits and no walks while striking out five.

The Cubs banged out 21 hits in the game.