why not?
he was one of the top rated ORT last year, getting moved to OG reduces his next contract potential at ORT or for that matter OLT which he has played before. While he would never beat out a clady he certainly could start at OLT on many teams in the lower echelon of the NFL.
2-5 million a year difference in OG with one year s experience over a top rated OT.
yes he got beat in the super bowl but until then he was near the top ..
But then everyone on the OL got beat in that game.
I think everyone was reading their press clippings about being a record setting offense and that Manning had hardly been touched all year. they forgot that Seattle's defense were reading those same clippings.
Plus it is likely he just does not like playing OG.