Dallas Cowboys wide receiver George Pickens pulled no punches while responding to Richard Sherman's criticism of his performance against the Detroit Lions on Thursday.Sherman questioned the wide receiver's focus and effort during the Cowboys' 44-30 loss. Pickens hit back at Sherman in a now-deleted Instagram story, saying the former cornerback should understand how the game worked and claiming he was nothing without the "Legion of Boom.""This is a team game Imao I'm not the only one on the team.stop becoming a analyst and talking about one player when he playin a teams game. Lots of shh has to go right for. Explosive. Plays ... and it's funny cause I thought former players would know that such as. RICHARD P***Y A** SHERMAN WHO BTW AINT SHH WITHOUT THE LEGION OF BOOM WE ALL REMEMBER SAN FRANCISCO BROTHER.."Much love --Don't speak on me unless you know the game of football As a former player not a d**kriding. Fan/Analyst that act like double team Is not a thing or certain bracket coverages don't exist. Knowing you played ball which Show me you a LEACH WIERDO Now twitter eat this up clouted ah wrld," Pickens wrote.This came after Sherman labeled Pickens the "big story" of the Cowboys' loss, claiming the wide receiver didn't put in enough effort to help his team win.“George Pickens, throughout the game, especially late in the game, looked uninterested," Sherman said. "And that’s what you can’t have. If you’re going to be a superstar, if you want to be the best receiver in the National Football League, you can’t ever be disengaged. It doesn’t matter if the game is going your way or not going your way, you can’t just disappear in these games or else you’re not going to have impact.”Sherman was an integral part of Seattle's "Legion of Boom" defense that led the NFL in pass defense in 2013 and 2014 and helped the Seahawks win the Super Bowl.Revisiting George Pickens' performance against the LionsGeorge Pickens struggled against the Lions, accounting for five receptions for 37 yards on nine targets. Fellow wide receiver CeeDee Lamb led the way with 121 yards on six receptions, while Ryan Flournoy posted 115 yards and one touchdown on nine catches.The Cowboys' playoff hopes took a big blow on Thursday, as they fell to 6-6-1, but they remain confident. They face the Minnesota Vikings in Week 15.