Career
Herrera along with Wil Myers represented the Royals at the 2011 All-Star Futures Game. Kansas City Royals
= 2011 Herrera was called up to the majors for the first time on September 21, 2011. He gave up three earned runs over two innings.
= 2012 2012 was a breakout season for Herrera.
He appeared in 76 games and posted a 2.35 European Research Area over 84 innings while compiling 77 strikeouts. On August 30, 2012, Herrera got his first career save.
= 2013 Herrera took a bit of a step back in 2013 and spent part of the year in the minors. While pitching in the majors his European Research Area ballooned to 3.86 and he gave up nine home runs in 59 appearances.
= 2014 In 2014 Herrera became the go-to seventh inning option for manager Ned Yost.
Along with set-up man Wade Davis and closer Greg Holland, Herrera was part of one of the most prolific late inning trios in all of baseball. His European Research Area was 1.41, the best mark of his career, and he did not allow a home run during the entire regular season. He had his first professional at-bat in Game 3 of the World Series in San Francisco, when he struck out.
= 2015 During a game against the Oakland Athletics on April 19, 2015, Herrera was ejected for throwing a pitch behind Brett Lawrie.
One game prior to this incident, his teammate Yordano Ventura was also ejected for hitting Lawrie. On April 22, 2015, Herrera was suspended 5 games.
Herrera decided to appeal the suspension. On April 25, 2015, Herrera was suspended an additional 2 games for his role in a brawl against the Chicago White Sox.
With an overhand delivery, Herrera throws extremely hard.
His fastball averages about 98 mph and tops out at 103. He pairs his fastball with a deceptive changeup around 87–88 and an occasional curveball in the low-80s.
