Robert John Gsellman graduated from Westchester (CA) High School...Played basketball and baseball...Won the California state title in basketball in 2010 as a junior...The team was ranked third nationally and played several games on ESPNU...Also won the state title as a senior...Tossed a shutout at Dodger Stadium to win the LA High School championship in 2009...His father, Bob, played professionally in the Phillies minor league system...He was a catcher from 1984-1987.
Made his first Opening Day roster and went 8-7 with a 5.19 ERA (69 earned runs/119.2 innings) in 25 games, 22 starts, for the Mets...His eight wins were second-most on the team behind Jacob deGrom's 15 victories...The Mets were 11-11 in his 22 starts...On the 10-Day DL from June 28-August 15, with a strained left hamstring...Over his final eight starts (August 16 to the end of the season), went 3-2 with a 3.50 ERA (17 earned runs/43.2 innings) including his first-career complete game, a rain-shortened 6.0-inning contest vs. Philadelphia on September 6...Posted a 2.25 ERA (one earned run/4.0 innings) in three relief outings...Won three straight starts while posting a 1.42 ERA from May 29-June 10...Only three other rookies in team history won three straight decisions with an ERA under 1.50...Jae Seo (2003), Jacob deGrom (2014) and Steven Matz (2016) are the others...Had a 49.3% groundball rate in 2017, which led all Mets starters (min. 10 games started)...In his two seasons in the majors, Gsellman owns a 50.4% groundball rate...Went 0-3 with a 7.07 ERA (22 earned runs/28.0 innings) in six starts from June 15-August 26...The Mets were 0-6 in those six starts.
Underwent left shoulder labrum repair surgery on October 12 at the Hospital for Special Surgery...Recalled from Las Vegas (AAA) on August 22 and went 3-2 with a 2.63 ERA (12 earned runs/41.0 innings) as a starter and 1-0 with a 0.00 ERA in one relief appearance (3.2 innings)...Tossed 3.2 scoreless innings in relief in his major league debut on August 23 at St. Louis and earned a victory after entering in the first inning...The only other pitcher in the modern era (since 1900) to earn a win in his major league debut as a relief pitcher who entered the game in the first inning was the Giants' John Montefusco on September 3, 1974...Research courtesy of Elias...Became the eighth reliever to earn a win in his first major league game in franchise history...Gabriel Ynoa also picked up a win as a reliever in his first career game on August 13, 2016...Made his first major league start on August 28 vs. Philadelphia...Went 3-1 with a 2.06 ERA (eight earned runs/35.0 innings) in six September starts...Struck out 35 and walked 11...New York was 4-2 in his six starts...His 2.06 ERA was seventh-best among major league starters who made at least five starts in September/October...Did not allow more than two runs while pitching 5.0 or more innings in each of his last four starts of the year...In innings 1-4, he had a 1.14 ERA (four earned runs/31.2 innings) and opponents batted .234 (26-111)...In innings 5-7, he had a 5.54 ERA (eight earned runs/13.0 innings) with batters hitting .308 (16-52)...Opened the season with Binghamton (AA) of the Eastern League and went 3-4 with a 2.71 ERA (20 earned runs/66.1 innings) pitched in 11 starts for the BMets before a promotion to Las Vegas...In nine starts for the 51s, he went 1-5 with a 5.73 ERA (31 earned runs/ 48.2 innings pitched).
Was named the Sterling Organizational Pitcher of the Year…For the season, he went 13-7 with a 2.89 ERA (46 earned runs in 143.1 innings) in 24 combined starts for St. Lucie (A) of the Florida State League and Binghamton (AA) of the Eastern League…Allowed 126 hits, with 37 walks and 146 strikeouts…Led the organization in wins and was third in ERA among qualified pitchers…Named to the Florida State League's mid-season All Star team…Jumped out to a 6-0 start with a 1.76 ERA after eight starts with St. Lucie (A) of the Florida State League…Was promoted to Binghamton (AA) of Eastern League where he spent the remainder of the year...Gave up 10 earned runs in 51.0 innings for St. Lucie…Went 8.0 shutout innings to turn back Palm Beach on May 4…Opponents hit .204 against him in the FSL…Was 5-2 with a 2.45 ERA (14 earned runs/51.1 innings) with two no-decisions in his final nine starts in the Eastern League.
Finished third in the South Atlantic League in ERA and first in complete games.
Was named to the New York-Penn League All Star Team...Won the Sterling Award for being named the MVP of his Cyclones club.