That latter run has cut his ERA from 2.97 to 1.67 and he's rebounded well from a rough first professional season in 2014. Drafted No. 27 overall last summer, he surrendered eight runs in 9 1/3 innings on his way to finishing 0-1 with a 7.71 ERA in six starts.
Weaver has been dominant in K-to-BB ratio in 2015. After Monday's performance, he has 77 strikeouts against 15 walks for the Cardinals.
Alex M. Smith is a reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.