Workman, 28, spent the 2016 season on the disabled list recovering from Tommy John surgery performed on June 15, 2015. He returned to minor league action on July 5 on a rehab assignment and finished 0-2 with a 7.65 ERA (17 ER/20.0 IP) in 10 rehab appearances over the course of the season between the Rookie-level GCL Red Sox, Short-A Lowell, and Double-A Portland. The 2013 World Series champion has 39 games of regular season major league experience (18 starts), going 7-13 with a 5.11 ERA (73 ER/128.2 IP) and 117 strikeouts. He has not appeared at the major league level since 2014.
With today's agreement, there are nine remaining unsigned Red Sox players eligible for salary arbitration: infielder Brock Holt, shortstop Xander Bogaerts, outfielder Jackie Bradley Jr., catcher Sandy Leon, and pitchers Fernando Abad, Joe Kelly, Drew Pomeranz, Robbie Ross Jr., and Tyler Thornburg.