Drafted by the New York Mets in the 20^th round (595^th overall) of the 2014 Major League Baseball (MLB) First Year Player Draft.

Assigned to the Kingsport Mets of the short-season Class A Appalachian League.

2014: Consensus All-East Region Selection (ABCA All-East Region first team, Daktronics All-East Region second team, National Collegiate Baseball Writers Association All-East Region second team). New England Intercollegiate Baseball Association Division II All-Star. All-Northeast-10 Conference first team selection. Made 11 appearances, all starts, for Stonehill during his junior season. Went 8-2 with a 1.84 ERA (7th in NE-10) and three complete games (6th in NE-10). Gave up 23 runs (17 earned) on 69 hits in a team-high 83.0 innings while walking just five batters all season (fewest among all NE-10 pitchers with atleast 64 innings pitched), striking out 62 and holding opponents to a .221 batting average. Gave up one run or fewer in six of his 11 starts, and allowed no earned runs four times. Struck out at least five batters on seven occasions, including 8+ punchouts four times. Threw seven shutout innings with three strikeouts in his first start of the season, an 8-0 win over Caldwell (2/21). Tossed six more shutout frames in his second start, a 7-1 victory against Saint Thomas Aquinas (3/8). Gave up just one unearned run over eight innings while striking out six in another win over Saint Thomas Aquinas (3/13). Struck out a season-high nine batters with no walks over seven innings of one-run ball in an 8-2 win against American International (3/20). Spun a complete-game, eight-strikeout gem while giving up one run in a 5-1 win at Franklin Pierce (3/28). Improved to 6-0 despite allowing five runs (four earned) on nine hits over six innings with five strikeouts in a 6-5 win at Assumption (4/2). Took his first loss against Assumption a week later (4/9). Went the distance for the second time, striking out five in a 7-0 win over Saint Michael's (4/19). Dropped his second decision of the season despite striking out eight and giving up just one earned run over seven innings in a 3-0 loss at Southern New Hampshire (4/27). Struck out eight with no walks for the second consecutive start, but did not earn a decision after lasting nine frames and giving up two runs in an eventual ten-inning, 3-2 loss to Merrimack (5/2). Posted his third complete game in his final start of the season, giving up two earned runs and striking out three in Stonehill's 11-4 triumph at Franklin Pierce in the first round of the NE-10 Tournament (5/7).

2013: NE-10 All-Conferece Third Team. NE-10 Pitcher of The Week (4/1/13). D2BaseballNews.com National Pitcher of the Week (4/1/13). Started 11 games on the mound for Stonehill during his sophomore season with the team. Notched a 4-4 record with a 2.63 ERA, 61 strikeouts, 23 earned runs, three complete games, and two shutouts. Held opponents to two runs or less four times during the year. Recorded five or more strikeouts in eight games and pitched 7+ innings in all but three starts on the season. Opened the year with an 8.1 inning loss to West Virginia Wesleyan College, giving up just two hits and two unearned runs while striking out six (2/22/13). Picked up his first win of the season in a 5.1 inning outing against Felician College, yielding just three runs (two earned) on five hits while striking out seven (3/2/13). Gave up just three hits in a complete game shutout during a 6-0 victory over the University of Bridgeport (3/15/13). Picked up his third win of the year when he tossed a one-hit shutout against nationally ranked Southern New Hampshire University (3/30/13). Earned his fourth win of the season in a seven-inning, five strikeout performance during the Skyhawks’ 4-3 victory over Saint Michael’s College (4/13/13). Duff Named to All-Conferece Third Team. Duff Garners NE-10 Player of The Week Honors. Duff Earns D2BaseballNews.com's National Pitcher of The Week Accolade.

2012: NE-10 All-Rookie Team. Appeared in 16 games for Stonehill - three starts - tossing one complete game, earning two combined shutouts and recording two saves in 51.1 innings pitched. Compiled a 2.10 earned run average, gave up 54 hits, 17 runs (12 earned), seven walks and 46 strikeouts. Notched the highest strikeout-to-walk ratio at 6.6 per nine innings pitched. Only pitcher on the staff to have a strikeout-to-walk ratio higher thatn 4:1. Held opponents to a .261 batting average. Left-handed batters only hit .176 against him on the season (6-for-34). Averaged eight strikeouts per game. Posted a 12.10 ground balls per game ratio to a 5.96 flyout per game ratio. Retired 50% of the inherited runners he faced on the season (5-for-10). Strung together a 6.1 innings scoreless streak to start his collegiate career yielding just six hits during that span and no walks. He also struck out six hitters during that stretch which spanned from February 24 to March 13. Made his collegiate debut on February 24 against Felician in game one of a twinbill pitching 2.1 innings, allowing two hits, no walks and two punchouts. Recorded his first-career collegiate save against Assumption College on March 29. Went 2.2 innings giving up zero hits, zero walks and struck out two batters. In his first-career collegiate start he tossed a complete-game effort versus UMass Lowell (March 25) allowing ten hits, one run (unearned), no walks and a career-high seven strikeouts. His first-career collegiate win also marked head coach Patrick Boen's 400th career win. Struck out at least one batter in 14 out of his 16 appearances. Stonehill went 9-7 overall when he appeared in a contest. From March 29 to April 9 (three appearances) he did not allow a run in 10.2-straight innings. Gave up just seven hits, one walk and struck out nine batters during that span. Went 15-straight appearances without giving up a home run. Made 11 appearances out of the bullpen of two innings or more. Duff Earns NE-10 All-Rookie Team Honors.

High School: 2011 graduate of Garden City High School. Two-year letterwinner. All-County selection. Earned the William Lucano award.

Personal: Born on November 15, 1993 in Garden City, N.Y. Son of Diane and Steve Duff of Garden City, N.Y. Has one brother, Billy (13), and two sisters Amy (21) and Casey (17). His father, Steve, played basketball at Stonehill. Lists greatest sports moment as pitching in the playoffs in his senior year of high school. His father, Steve, played basketball at Stonehill. Supports the New York Mets.

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