Ryan William Cook
- Bats Right, Throws Right
- Height 6' 3", Weight 200 lb.
- School University of Southern California
- High School Clovis High School
- Debut July 20, 2011
Cook had a nightmarish major league debut with the Arizona Diamondbacks facing the Milwaukee Brewers on July 20, 2011. Coming into the game in the top of the 10th inning with the score tied at 2-2, 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 from the game 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 Ps 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 its 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 innings streak from the start of the season to 19 2/3, the longest in the American League that season.
- AL All-Star (2012)