Nick Hogan -- Jerry Lawler Should Quit Wrestling After Heart Attack

Hulk Hogan's son Nick Hogan is incredibly relieved that Jerry "The King" Lawler has stabilized since his heart attack Monday night -- but tells TMZ, it might be time Lawler considered retirement.

Nick tells us, wrestling "takes a toll" on your body -- and as a result, "most guys retire around 50ish." Lawler is 62.

According to Nick, people in the wrestling business have varied career lengths -- but when injuries come into play, it's hard to ignore the obvious ... it's time to slow down.

Nick uses his own dad as an example -- saying even his 59-year-old father has cut back drastically on wrestling because of serious back injuries.