Seattle Mariners Executive Vice President & General Manager of Baseball Operations Jerry Dipoto announced Monday that the Mariners have acquired infielder Shed Long from the New York Yankees in exchange for minor league outfielder Josh Stowers. In order to make room on Seattle's Major League, 40-man roster, the club has designated for assignment infielder/right-handed pitcher Kaleb Cowart. 
Seattle's 40-man roster remains at 40. 
Seattle has 7 days to trade, release or outright the contract of Cowart to the minor leagues. 
Long, 23, spent the 2018 season with Double-A Pensacola, batting .261 (118x452) with 75 runs scored, 22 doubles, 5 triples, 12 home runs, 56 RBI, 57 walks and 19 stolen bases in 126 games. Among Southern League leaders Long ranked T4th in runs scored (75), T8th in games played (126), 9th in hits (118) and on-base percentage (.353), T9th in walks (57), T10th in triples (5), T11th in stolen bases (19), T13th in extra-base hits (39), 14th in OPS (.765), 15th in slugging percentage (.412) and 17th in doubles (22). He also led all Southern League second baseman with a .971 fielding percentage. Long represented Pensacola on the Southern Division Southern League All-Star team, going 2-for-4 with 1 run scored, 1 double, 1 home run, 2 RBI and 1 walk as the starting second baseman. He also appeared in 19 games with the Scottsdale Scorpions in the Arizona Fall League and participated in the AFL All-Star game. Long entered the 2018 season rated by Baseball America as the 8th-best prospect in Cincinnati's system and was currently ranked by MLB.com as the 7th-best prospect in the Reds organization.
Long was originally selected by the Reds in the 12th round of the 2013 MLB First-Year Player Draft out of Jacksonville High School. Over 6 minor league seasons, he is batting .272 (445x1635) with 231 runs scored, 86 doubles, 15 triples, 50 home runs, 211 RBI, 188 walks and 54 stolen bases in 457 career games. In 2017 Long was a Florida State League All-Star and Minor League Baseball's FSL Player of the Month for May. Also in 2017 he was rated by managers as the best defensive second baseman in the Florida State League. 
Stowers, 21 (turns 22 on Feb. 25), made his professional debut with Short-A Everett in 2018. He appeared in 58 games with the AquaSox, batting .260 (52x200) with 32 runs, 15 doubles, 5 home runs, 28 RBI, 37 walks and 20 stolen bases. Among Northwest League leaders, he ranked 2nd in walks and 8th in on-base percentage (.380). The native of Chicago represented Everett on the Northwest League All-Star team and went 1-for-5 as the starting centerfielder. Stowers was selected by the Mariners in the 2nd round (54th overall) in the 2018 MLB First-Year Player Draft out of the University of Lousiville.
Cowart, 26, was claimed off waivers by Seattle from Los Angeles-AL on Dec. 10, 2018. He appeared in 47 games over 4 stints (6/2-5, 6/8-19, 6/30-7/4, 7/31-end of the season) with the Los Angeles Angels in 2018. Overall the 6-foot-3, 225-pound switch-hitter, hit .134 (15x112) with 7 runs scored, 7 doubles, 1 triple, 1 home run, 10 RBI, 10 walks and 1 stolen base. Cowart also appeared in 64 games with Triple-A Salt Lake, batting .287 (74x258) with 36 runs scored, 20 doubles, 3 triples, 6 home runs, 45 RBI, 18 walks and 8 stolen bases. 
Cowart was originally selected by the Los Angeles Angels in the 1st round (18th overall) in the 2010 MLB First-Year Player Draft out of Cook High School in Adel, GA. Over parts of 4 Major League seasons with the Angels, he hit .177 (61x345) with 41 runs scored, 18 doubles, 2 triples, 6 home runs, 33 RBI, 25 walks and 6 stolen bases.