Robert Cunningham Ayrault (born April 27, 1966) is an American former professional baseball right-handed pitcher, having played for two Major League Baseball (MLB) teams.

Bob Ayrault
Relief pitcher
Born: (1966-04-27) April 27, 1966 (age 57) South Lake Tahoe, California
Batted: Right Threw: Right
MLB debut
June 7, 1992, for the Philadelphia Phillies
Last MLB appearance
July 25, 1993, for the Seattle Mariners
MLB statistics
Win–loss record	5–3
Earned run average	4.05
Strikeouts	42
Teams
Philadelphia Phillies (1992–1993) Seattle Mariners (1993)

An alumnus of the University of Nevada, Las Vegas, Ayrault would make his MLB debut with the Philadelphia Phillies on June 7, 1992, against the St. Louis Cardinals, at Veterans Stadium, in Philadelphia; his last MLB appearance was for the Seattle Mariners, on July 25, 1993, on the road, versus the Cleveland Indians (at Cleveland Stadium). Although he pitched minor league ball for a few more seasons, his major league career was over at only age 27.