Cronulla jerseys emblazoned with Paul Gallen's image will feature as the farewells begin this weekend for one of the most durable and dedicated NRL retiring classes of recent times.

The NRL will lose more than 2500 games of experience to retirements at the end of the season, including 300-gamers Cooper Cronk, Robbie Farah, John Sutton and Gallen.

Greg Inglis (left) and Cooper Cronk after last year's preliminary final won by the Roosters. Credit:AAP

Warhorse Matt Scott, veteran fullback Michael Gordon and evergreen journeymen like Jeremy Latimore and Blake Ayshford will also finish up, while Greg Inglis was forced to end his career earlier this year.

James Maloney and Gareth Widdop then sit atop a list of players leaving the NRL for England, with neither of them likely to return.