Jon Gruden's loss could be Vince McMahon's gain ... 'cause 'Last Chance U' star Ronald Ollie is getting an invite to join the XFL.
Ollie became a fan favorite on the Netflix docu-series ... which followed East Mississippi Community College football team for the first 2 seasons.
The guy clearly has talent ... he showed that on 'LCU' and went on to ball out at Nicholls State from 2016-2018, earning 13.5 tackles for loss, 5 sacks and 2 fumble recoveries.
Ollie earned All-Southland conference honorable mention in 2018 ... which was enough to land him an invite to Oakland Raiders training camp earlier this season.