Drafted by Baltimore Orioles in the 23rd round of the 2015 MLB Draft, signed professional contract
2015: 16 APP/15 GS, 6-4, 3.08 ERA, 96.1 IP, 106 H, 46 R, 33 ER, 17 BB, 70 SO ... April 17: in 7.1 innings against North Dakota, had six strikeouts and allowed zero earned runs ... April 10: pitched 8.0 innings against New Mexico State, allowing only five hits, one run, and one earned run, also struck out three batters ... March 06: struck out six batters in 7.0 innings of work against UC Davis, allowing only one earned run and one run ... February 28: struck out six batters in 7.0 innings against Fairleigh Dickinson, allowing only three hits, and no earned runs ... February 20: pitched 9.0 innings against Cal State Northridge, had seven strikeouts and only allowed four hits, one run, and one earned run
2014: 21 APP/7 GS, 6-5, 3.25 ERA, 1 CG, 1 SHO, 2 SV, 69.1 IP, 69 H, 36 R, 25 ER, 17 BB, 51 SO ... May 16: earned win against Bakersfield, 6.2 IP, 9 H, 1 ER, 1 BB, 4 SO ... April 26: threw complete game shutout at North Dakota, 9.0 IP, 7 H, 8 SO ... April 18: earned win at New Mexico State, 6.2 IP, 6 H, 2 ER, 4 BB, 5 SO ... April 5: pitched eight innings of relief at Sacramento State, allowing just four hits, one walk, and one run with four strikeouts ... February 21: earned save with one inning of relief at Cal State Northridge ... February 15: earned victory with two innings of one-hit relief at UC Davis ... February 14: earned save with one inning of relief at UC Davis
2013: 31 appearances ... 2-0 ... 2.78 ERA ... 1 save ... 15 strikeouts ... WAC: 15 appearances ... 1-0 ... 2.50 ERA ... 6 strikeouts ... March 30 at Texas State: threw 2.1 scoreless innings in relief, striking out one batter ... March 17 vs. UC Davis: threw 1.0 scoreless innings, striking out one batter ... March 8 at Portland: threw 2.2 scoreless innings while striking out two to earn the save.
High School: Dennis played two years on the varsity team at Saratoga High School. He was the team MVP in his senior year, as well as first team All-de Anza League. The Falcons lost in the quarterfinals of the state playoffs during his final year.
Personal: Full name is Donald William Dennis. His parents are Susan and Peter Dennis, and his older sister Clare is a member of the sailing team at Yale University. He is a business management major in the Albers School of Business and Economics.