10/20/2010 05:25 pm ET | Updated May 25, 2011

James Harrison Contemplating Retiring Because Of New NFL Rules

Pittsburgh Steelers linebacker James Harrison, who was fined $75,000 for a pair of helmet-to-helmet hits in Sunday's game against the Cleveland Browns, is reportedly contemplating retirement because of the new league rules for dangerous hits.

Harrison's agent, Bill Parise, told Adam Schefter of ESPN that his client is "very serious" about retiring.

"We wouldn't joke about this. This is a very serious issue. James is very concerned about how to play football," said Parise. "If James is going to be fined $75,000 for making a legal tackle, then how do you go play football? It's quite frustrating to James, to coach [Mike] Tomlin, to me, to everybody."

Harrison was reportedly excused from Wednesday's practice after meeting with Steelers head coach Mike Tomlin.

Harrison dished out two violent hits on Cleveland's Joshua Cribbs and Mohamed Massaquoiout. Both suffered concussions and left the game.