ALAMEDA — The Oakland Raiders are making a commitment to one of the NFL’s best players.

Menacing pass rusher Khalil Mack had his fifth-year contract option exercised by Oakland on Thursday, presumably keeping him with the team through the 2018 season.

The AP Defensive Player of the Year for 2016, Mack had sacks in eight straight games during one stretch last season and finished with 11 — the All-Pro edge rusher’s presence such that opponents sent multiple blockers his way but still didn’t stop one of the NFL’s elite defenders. He was part of 73 tackles, had his first career interception and touchdown, and forced five fumbles while recovering three.

And he did it all for a defense ranked 26th overall.

The 26-year-old Mack won last year’s AP award for top defender by beating out 2016 Super Bowl MVP Von Miller of Denver by one vote. A first-round draft pick, selected fifth overall out of Buffalo in 2014, Mack quickly emerged among the league’s elite in his third NFL season.

The Raiders, whose move to Las Vegas was approved by owners last month, returned to the playoffs for the first time in 14 years and hope to build on a 12-4 season under coach Jack Del Rio as a projected AFC power again. Oakland hadn’t been to the postseason since 2002. It lost in the wild-card round to Houston without injured quarterback Derek Carr after he broke his leg in a Week 16 loss to the Colts.

Bolstering defense

CHOICE: DeForest Buckner (1st Round, 7th overall)

RESUME: DE, Oregon

VITALS: 6-7, 300

WHY HIM? The 49ers defense recorded only 28 sacks last season—fourth-worst in the NFL. Buckner recorded 67 total quarterback pressures in 2015. He could be the 49ers’ best pass-rusher as a rookie next season.

NOTES: Won the Pac-12 Defensive Player-of-the-Year Award in 2015 and earned a first-team All-America selection. Oregon’s Most Outstanding Player last season. Grew up in Waianae, Hawaii. Majored in General Social Science at Oregon.

Going for a guard

CHOICE: Joshua Garnett (1st Round, 28th overall)

RESUME: Guard, Stanford

VITALS: 6-5, 321

WHY HIM? The 49ers struggled creating holes last season in the running game without guard Mike Iupati. Garnett should replace Iupati and give starting tailback Carlos Hyde a dominant blocker to follow through the hole.

NOTES: Won the Outland Trophy Award in 2015 for the Nation’s most outstanding interior lineman. Also won the Morris Trophy Award for the Pac 12’s lineman of the year. Majored in Human Biology at Stanford and plans to go to medical school.

Grant Cohn's Inside the 49ers blog