Ryan William Cook
- Bats Right, Throws Right
- Height 6' 3", Weight 200 lb.
- School University of Southern California
- High School Clovis (CA) High School
- Debut July 20, 2011
- Final Game September 27, 2018
A 27th round pick by Hal Kurtzman and the Arizona Diamondbacks in the 2008 amateur draft, Cook had a nightmarish major league debut against the Milwaukee Brewers on July 20, 2011. Coming on in the top of the 10th inning with the score tied at two, he allowed all four batters he faced to reach base, three on a hit and one on a walk. Three of them came around to score and he was charged with the 5-2 loss, being lifted without having retired a batter. Overall, he pitched 12 games in his first season, going 0-1, 7.04. After the season, he was traded on December 9th to the Oakland Athletics with Collin Cowgill and Jarrod Parker in return for pitchers Trevor Cahill and Craig Breslow.
On April 27, 2012, Cook became the third pitcher in Athletics history to strike out four batters in one inning, pulling the feat in the 8th inning of a game against the Baltimore Orioles. Blake Stein and Erik Hiljus had previously accomplished the feat for the Green and Gold, and Cook's was the 59th instance in the major leagues. When he was the winner in Oakland's 5-4, 10-inning victory over the Texas Rangers on May 17th - his first major league win - he extended his scoreless inning streak from the start of the season to 19 2/3, the longest in the American League that season. Ryan made an All-Star Game appearance that summer, pitching a scoreless 7th inning, and finished his season 6-2, 2.09 with 14 saves in 71 games. In 2013, he was similarly stellar, finishing at 6-4, 2.54 in 71 games. He battled injuries in an abbreviated 2014 (1-3, 3.42 in 54 games) then imploded in 2015, finishing 0-2, 18.69 in 9 games split between the A's and Boston Red Sox. He spent 2016 in the Seattle Mariners organization without appearing at the major league level, missed all of 2017 due to Tommy John surgery and resurfaced for 18 games with the M's in 2018 with a 5.29 ERA. After a 2019 season with the Yomiuri Giants (0-2, 6 Sv, 4.80), he signed with the Miami Marlins for 2020.
- AL All-Star (2012)