Yes, he has.
Previous 2 seasons he had 125 days out injured with pulled hamstrings, thigh strains and muscular problems.
The evidence was there. And ignored.
Jean-Philippe Gbamin - Injury history
This is the injury history of Jean-Philippe Gbamin from USL Dunkerque. On this page injuries as well as suspensions.
www.transfermarkt.co.uk
Dunno Y’know mate. According to this source he’s only missed 12 games in 3 season.