Rhett Harrison Wiseman (born June 22, 1994), nicknamed "Wise", is an American former professional baseball outfielder.

Wiseman started for Israel at the 2017 World Baseball Classic qualifier, helping the team advance to the tournament proper.

In 2018, he was named a post-season Carolina League All Star, and led all Nationals' minor leaguers in home runs, with 21.

Wiseman attended Buckingham Browne & Nichols high school in Cambridge, Massachusetts, where he played baseball as a left-handed hitting center fielder.

[6][9] He was also president of his high school class, and earned letters for three years in football, as a defensive back and wide receiver.

[8] Wiseman was timed at 6.59 seconds in the 60-yard dash, which the Boston Globe opined put him in the "elite runner" category.

[13] The head coach of Groton School said he was "very disciplined at the plate, with a short, compact, powerful swing ... [and] Defensively, he has great ability in center field and an above-average arm... a five-tool player.”[14] In 2012, Wiseman was ranked # 42 of players in the major league baseball draft by ESPNHS, and # 47 by MLB Draft Guide.

[23] Wiseman was hit in his neck by an 89 mph fastball while batting during a College World Series game against TCU, and was hit so hard that the impact left a red mark that even showed the outlines of the baseball's laces on his neck, but stayed in the game (telling his coach "it's the College World Series, baby.

[24][25] MLB Draft Guide's scouting report on him said: “A power/speed combination in center field, Rhett Wiseman is often compared to Johnny Damon.

Wiseman has a short quick swing.... A pull hitter with some loft, he has plus bat speed and good power potential.

He is the type of player that fans and coaches will love.”[26] ESPNHS in their scouting report wrote: “One of the best outfielders in the 2012 class, Wiseman is a five tool prospect....”[26] He was selected to the 2015 Jewish Sports Review College Baseball All-America team.

The Baseball America 2016 Prospect Handbook said that he had athleticism, raw tools, bat speed, strength, good route running and instincts in the outfield, and fit best in right field, but that he struck out at a high rate.

[34][35] Wiseman spent 2017 with the Potomac Nationals of the High-A Carolina League, with whom he batted .229 with 13 home runs and 55 RBIs in 123 games.

[43] He spent the entire 2021 season with Double-A Harrisburg, playing in 85 games and hitting .217/.277/.378 with 9 home runs and 30 RBI.