Brocktober officially is over.

Brock Osweiler, who parlayed a brief stint in relief of Peyton Manning with the Broncos into a $72 million free-agent contract, announced his retirement Wednesday from the NFL.

“I’m extremely grateful for the time I did receive playing in the National Football League,’’ Osweiler told 9News. “The experiences I did have, people I did meet, relationships I did make — I’m not going to dwell on the things that didn’t happen in my career.

‘Being a kid from Kalispell, Montana, playing for the Denver Broncos, winning a Super Bowl, having the opportunity to sign a second contract – when you look back on it, I couldn’t be more appreciative. It was great.”

Osweiler was Denver’s second-round pick in 2012 — ahead of Russell Wilson, Kirk Cousins and Nick Foles — and backed up Manning for three seasons before an injury pressed him into starting duty for four games in 2015. Manning returned in time for the playoffs, however, and led the Broncos to a win in Super Bowl 50 over Carolina.

Osweiler signed a $72 million deal with $36 million guaranteed with Houston, but he was salary-dumped after one season to Cleveland and released before ever playing for the Browns. He briefly returned to Denver in 2017 before appearing in seven games last season with Miami.