You keep ignoring the fact that Parnell played a significant amount before hitting F.A. and that it's possible Leary will not have played any meaningful snaps in almost 2 years.
So a "significant" amount is 5 whole games in 2014, and two others in the three years prior? Leary started 16 (2013), 15 (2014), and 4 (2015) games the last three seasons. It's flat out idiotic to think he can't play.
Also Parnell is a tackle.
Non-LT OL contracts are the same.
How do you justify paying somebody 20+ million when they have not played in 2 years.
He's much better and two years younger than Jermey Parnell, and everyone in the NFL knows it.
Leary was starting until he got injured just enough to provide an excuse to start Collins instead. It can be argued that Leary was still technically better, but there was no way Collins was getting benched.
And Leary will still get playing time and likely start this year too.
So if 7 total games in 4 years got Jermey Parnell a monster contract, then you can bet a younger, better, and more experienced Ronald Leary is definitely getting all that and more.