Sucks for Collins.
You can bash Jerry all you want, but I'm of the opinion that one of his strengths/advantages in the league is his aggressiveness in the rookie free agent market. Also I would wager players have a high opinion of this organization and believe we are a team that will give rookie free agents an actual shot at the roster.
From Leary's Wikipedia: "the Cowboys gave him a $9,000 signing bonus and guaranteed $205,000 of his $390,000 base salary."
From Collin's Wikipedia: "His entire three-year contract was guaranteed and worth $1,599,000 with a $21,000 signing bonus."
Leary now has a chance to play for his careers primary contract (great for both parties involved), we get a better comp pick possibly, and of course plug Collins back in as he is hopefully a main cog of this line for years to come.