The final year of Larry English's rookie contract will end on injured reserve.

The Chargers placed the outside linebacker on IR Tuesday with a pectoral injury suffered in Sunday's game against the Broncos. He was seen favoring his right arm following a second-quarter sack of Peyton Manning, exiting the game shortly thereafter. Outside linebacker Adrian Robinson was signed in a corresponding move.

It's the latest health hurdle for English.

A 2009 first-round draft pick, a foot injury put a stop to his second and third seasons, missing 19 games over that span. English's work ethic is well regarded within Chargers Park, but injuries have limited his production.

English has started nine of 52 games over five seasons, totaling 80 tackles and 11 sacks. In 2013, he had 17 tackles and 2.5 sacks, not missing a practice or game. He played 382 defensive snaps after 408 the previous three years combined.

This season could be the last of English's Chargers career. Next March, he is scheduled to become an unrestricted free agent.