Logan Shane Allen (born May 23, 1997) is an American professional baseball pitcher for the NC Dinos of the KBO League.

He has previously played in Major League Baseball (MLB) for the San Diego Padres, Cleveland Indians/Guardians, Baltimore Orioles, and Arizona Diamondbacks.

On November 13, 2015, Allen, along with Manuel Margot, Javier Guerra and Carlos Asuaje, were traded to the San Diego Padres for Craig Kimbrel.

[6][7] The Padres assigned him to the Fort Wayne TinCaps,[8] where he spent the whole season, posting a 3–4 record and 3.33 ERA in only 15 games (11 starts) due to spending time on the disabled list with an injury.

He spent 2017 with both Fort Wayne and the Lake Elsinore Storm, pitching to a combined 7–9 record and 2.95 ERA with 142 strikeouts in 125 total innings pitched (24 games, with 23 being starts) between both teams, and 2018 with the San Antonio Missions and the El Paso Chihuahuas, going 14–6 with a 2.54 ERA in 25 games (24 starts) and was named Texas League Pitcher of the Year.

[11] He pitched seven shutout innings for the win against the Milwaukee Brewers, with five strikeouts and two walks, and also had his first major league hit, later scoring on an error.

[15] However, Allen struggled with command over the regular season and was optioned to Triple-A affiliate Columbus Clippers for the majority of May through August.

Allen worked out of the bullpen for Albuquerque in 2023, making 24 relief appearances but struggling to a 7.20 ERA with 50 strikeouts in 45.0 innings pitched.

[25] On April 18, Allen made his Diamondbacks debut, allowing three hits and one earned run with three strikeouts in 4+2⁄3 innings in a loss against the San Francisco Giants.