♦ Spent season with Norfolk, where he hit .312 with 25 home runs and 83 RBI in 127 games.
♦ Entered year ranked among the Top 10 Orioles Prospects and Top 100 Overall Prospects by MLB.com (#2, #71), Baseball Prospectus (#2, #51) and Baseball America (#3, #90).
♦ Named the International League Most Valuable Player, Norfolk's first MVP as an Orioles affiliate and the sixth MVP in franchise history (first since Roberto Petagine in 1997).
♦ Named Orioles Brooks Robinson Minor League Player of the Year after leading O's minor leaguers in average (.312), home runs (25), RBI (83), OPS (.871), doubles (35), slugging (.527), extra-base hits (61) and total bases (274).
♦ Named Orioles Minor League Player of the Year by Baseball America.
♦ Honored as an Orioles organization All-Star by MiLB.com for the fifth straight season.
♦ Led International League with 162 hits, becoming the first Tides player to lead the league in hits since Mike Cervenak did so with 157 hits in 2007. The 162 hits tied for 6th in all of Minor League Baseball and were the 5th-most in Tides franchise history.
♦ Named International League Midseason and Postseason All-Star. Was just the fourth Tides position player to earn an IL Postseason All-Star nod since Norfolk became an O's affiliate in 2007, joining Oscar Salazar (2008), Dariel Alvarez (2015) and Pedro Alvarez (2017).
♦ Earned Orioles Minor League Player of the Month honors in July after batting .333 (36-108) with 11 doubles, four home runs, 15 runs and 15 RBI over 25 games.
♦ Ranked among IL leaders in hits (1st, 162), total bases (1st, 274), extra-base hits (2nd, 61), doubles (3rd, 35), RBI (5th, 83), average (5th, .312), runs (5th, 81) and slugging (6th, .527).
♦ Matched a Norfolk franchise record with three home runs, 6/2 vs. Louisville - one day after hitting a walk-off solo homer in an 8-7 win over Louisville. Was the first Tides player to homer three times in a game since Chase Lambin on 7/13/05.
♦ Since the Tides became an Orioles affiliate in 2007, no player has registered more hits (162) or runs (81) than Mountcastle recorded in 2019, while his .312 average was tied for the second-best recorded by a Tide as an O's affiliate (trailing Oscar Salazar, .316 in 2008).
♦ Named IL Batter of the Week for the week of 4/15 - 4/21 after hitting .370 with 11 RBI.
♦ Named O's Minor League Player of the Month in July (.333, 4 HR, 15 RBI in 25 games).
♦ Set a new career-high with a 15-game hitting streak, 7/16 - 7/31.
♦ Registered two four-hit games, 5/1 at Durham and 7/27 at Lehigh Valley.
♦ Hit .349 (52-149) with nine home runs and 27 RBI against left-handed pitching.
♦ Rated as a Top 100 Prospect entering 2018 by Baseball Prospectus (#65), Baseball America (#71) and MLB.com (#98).
♦ Spent the season with Bowie, hitting .297 with 13 home runs and 59 RBI in 102 games.
♦ Named Eastern League Midseason All-Star and an Orioles Organization All-Star by MiLB.com.
♦ Selected to play in the MLB Futures Game, played at Nationals Park in Washington, DC.
♦ His .297 average ranked 4th among O's minor leaguers and 7th in the Eastern League.
♦ Opened the year on Bowie's disabled list with a hairline fracture in his right hand after being hit by a pitch during a minor league spring training game. First game played was 5/10.
♦ Batted .315 against Eastern League right-handers.
♦ Registered a career-high 13-game hitting streak from 6/27 - 7/12, batting .345 (19-55).
♦ Hit .311 with six home runs and 33 RBI in 53 home contests.
♦ Matched his career-high with four RBI, 5/22 vs. Altoona.
♦ Split season between Frederick and Bowie, hitting .287 with 18 home runs and 62 RBI.
♦ Named a Carolina League Midseason and Postseason All-Star with Frederick after hitting .314 with 15 home runs and 47 RBI in 88 games.
♦ Led all of MiLB with 48 doubles and ranked 4th in MiLB with 67 extra-base hits.
♦ His .287 average ranked 9th among Orioles minor leaguers.
♦ Named MiLB.com Orioles Organization All-Star and a Baseball America High Class-A All-Star.
♦ Ranked among Carolina League leaders in average (1st, .314), extra-base hits (1st, 51), slugging % (1st, .542), doubles (T-2nd, 35), total bases (4th, 195) and HR/AB ratio (5th, 1/24.0).
♦ Went 4-4 with three solo home runs and four runs scored, 5/26 vs. Buies Creek; was the second Frederick player to ever homer three times in a game, following Austin Hays, who accomplished the feat just two days prior.
♦ Hit .376 (41-109) against Carolina League left-handed pitching.
♦ Promoted to Double-A Bowie on 7/20 and spent the remainder of the season there.
♦ Named to the Arizona Fall League Rising Stars Team after playing for Salt River.
♦ Ranked as the #2 prospect in the Orioles system after the season by Baseball America.
♦ Spent year with Delmarva, where he hit .281 with 10 home runs and 51 RBI in 115 games.
♦ His .281 average ranked 11th in the South Atlantic League.
♦ At 19 years old, was 2.4 years younger than the average South Atlantic League player.
♦ Named an MiLB.com Orioles Organization All-Star.
♦ Recorded more multi-hit games (38) than hitless games (37).
♦ Had a career-high five hits and three runs scored on 6/6 at West Virginia.
♦ Named the South Atlantic League Player of the Week on 6/13.
♦ Set a career-high with four RBI on 6/29 vs. Greensboro (2-3, 2B, R, 4 RBI).
♦ Batted .379 (44-116) with a .425 on-base percentage against left-handed pitching.
♦ Rated as the Best Athlete in the Orioles organization according to Baseball America.
♦ After the season, was rated as the No. 15 prospect in the GCL by Baseball America.
♦ Named a an Orioles Organizational All-Star by MLB.com.
♦ Named the Organizational Player of the Month for June after batting .348 (31-89).
♦ Selected by Baltimore in the 1st round (36th overall) of the 2015 draft.
♦ Attended Paul J. Hagerty High School (FL), where he hit .500 with two home runs and 22 stolen bases as a high school senior. Had committed to the University of Central Florida before signing with the Orioles.
♦ Paul J. Hagerty HS has also produced NFL QB Jeff Driskel and current Phillies RHP Zach Eflin.