J.A. Happ (2009, starting pitcher, ROY voting: 5th)
Happ made his Major League debut in 2007 but maintained rookie status in 2009 due to the fact he made only nine appearances combined in 2007 and 2008. As a rookie for the defending World Series champions, Happ did well. He appeared in 35 games, 23 as a starter, wining 12 and losing only four with a 2.93 ERA. Happ had two shutouts, which tied for the league-lead. Recognized for his efforts, Happ finished second in Rookie of the Year voting.
Despite his success in 2009, Happ was traded to the Astros in July 2010 for Roy Oswalt. With the Astros, Happ went 5-4 with a 3.75 ERA in 13 games. However, he struggled to find his form in 2011 and 2012, going a combined 16-26 with an ERA around five with the Astros and Blue Jays.
Happ had a bonce back season of sorts in 2014, winning 11 with a 4.22 ERA with Toronto. After a solid season with the Mariners and Pirates in 2015, Happ was back with the Blue Jays in 2016. That proved to be a career season for Happ, going 20-6 with a 3.18 ERA, finishing sixth in the Cy Young award voting.
This past season, Happ made his first All-Star appearance, going 17-6 overall (including 7-0 with the Yankees) and an ERA of 3.65.