Irvin and Novacek didn't have the leverage Dez had, they both only had one good season. Both were signed by the start of the regular season. Irvin's numbers dropped slightly after his extension, he was still having great, productive seasons that had him as one of the top 2-3 receivers in the game. He had 1396 yards in 92 which was only 127 yards fewer than his previous season and 75 yards more than Dez's career high. Only Sterling Sharpe had more receiving yards than Irvin that season. Irvin's yards per catch average in 92 was 17.9 which was higher than in 91 and he caught only one fewer TD. In 93 he had 1330 yards receiving with another 7 TD's and those 1330 yards was second in the entire league behind only Jerry Rice. The 7 TD's he caught in 92 and 93 were only one off his career high.
While he was having very productive seasons that had him as one of the top receivers in the league after signing his contract, Dez's numbers have completely fallen off to the point where he's not even the most productive receiver on his own team. His numbers have fallen off to the point where he doesn't even resemble the same player anymore. He ranked 5th on the team in receiving last season and he's 4th on the team this season. A couple of years ago he was one of the top 3-4 receivers in the league and now he's not even mentioned with some of the best receivers in the game. To compare Irvin's drop in production after his contract with Dez's drop in production the past 2 seasons is hilarious! LOL Irvin's numbers DWARF Dez's numbers the 2 seasons following his contract extension, go do a comparison.