Fletcher Cox #91 of the Philadelphia Eagles reacts to a...

Fletcher Cox #91 of the Philadelphia Eagles reacts to a sack on Tyrod Taylor #5 (not pictured) of the Buffalo Bills during the first quarter at Lincoln Financial Field on Dec. 13, 2015 in Philadelphia. Credit: Getty Images / Mitchell Leff

PHILADELPHIA — Standout defensive tackle Fletcher Cox agreed Monday to a six-year contract with the Philadelphia Eagles that could earn him nine figures.

The first-round draft pick in 2012 has been a starter since midway in his rookie season. One of the NFL’s most versatile defensive linemen, he has 308 tackles and 22 sacks in his four pro seasons.

Cox, 25, did not attend the team’s organized offseason activities, but returned to the team last week.

He comes off his best NFL season with 104 tackles (80 solo) and 9 1⁄2 sacks. He had three sacks against New Orleans in Week 5, a career high.

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