Clayton Kershaw struck out 15 batters while throwing a no-hitter against the Colorado Rockies on Wednesday night, but it actually wasn't the first time he accomplished the feat.

The left-hander was a high school prospect back in 2006 when he went 13-0 with a 0.77 ERA and 139 strikeouts in 64 innings. His best effort that season was for Highland Park High School in a playoff game against Northwest High School.

Kershaw pitched a perfect game, striking out every batter he faced. The game ended after five innings following an invocation of the 10-run mercy rule, giving Kershaw a no-hitter with 15 strikeouts.