The big catch in the 2010 trade of Roy Oswalt to Philadelphia, the Northwestern University product finished second in the 2009 N.L. Rookie of the Year race. The lefthander blew hot and cold during his time in Houston, compiling an 18-28 record before he was traded to Toronto in a ten-player deal before the 2012 trade deadline.

Happ has since pitched for the Mariners, Pirates and Yankees as well as two stints with the Blue Jays and was a 2018 All-Star. Through 2019, Happ's record is 121-90 with a 3.99 ERA.