Heres a quick excerpt from a scouting report I found at SB nation on Thomas.
"Thomas has excellent power, size and athleticism. He is a ball-hawk defender who excels at stuffing the run but also has the ability to explode and make plays into the backfield. He has had off-field problems in the past (in College) and has a big challenge in proving he can stay focused on football. The motivation is not always there and he can be inconsistent at times. He is an adequate starting Defensive Lineman.
In 2011, Marcus made $1 Million. He has stated he wants to stay in Denver, but is sure to want a raise. The minimum he could receive in 2012 would be $700,000. I don't see him signing for that. Thomas and the Broncos could nor agree to an extension last season and that may have mainly been a cause of the Lockout. Many teams refused to sign long term deals because of the uncertain future. Now that has been resolved and maybe they can come to terms. Marcus has definitely improved each season and i believe he has earned a new deal."