Greg Lomack Allen
- Bats Both, Throws Right
- Height 6' 0", Weight 175 lb.
- School San Diego State University
- High School Hilltop High School (Chula Vista)
- Debut September 1, 2017
Outfielder Greg Allen made his major league debut with the Cleveland Indians on September 1, 2017, with the Indians in the middle of a record-setting 22-game winning streak. He hit .229 in 25 games the rest of the way. He was on the team's postseason roster, being used twice in the Indians' loss to the New York Yankees in the Division Series, once as a defensive replacement in center field and once as a pinch-runner. On May 27, 2018, he put an end to an epic contest between the Indians and Houston Astros by leading off the bottom of the 14th inning with a walk-off homer off Brad Peacock for a 10-9 Cleveland win. The Astros had scored 6 times in the 8th and the Indians 5 times in the bottom of the 9th to force extra innings, and the two teams had traded solo homer in the 13th before Allen ended the game.