ALAMEDA -- Rod Streater and Andre Holmes have played so well of late that there is no need for the Raiders to lament the one who got away.

San Diego Chargers wide receiver Keenan Allen, a contender for the NFL's offensive rookie of the year award, played at Cal, in the Raiders' backyard.

Although in need of a playmaking wide receiver, the Raiders passed on Allen three times in the NFL draft in favor of cornerback DJ Hayden, tackle Menelik Watson and linebacker Sio Moore.

Ten spots after Moore was drafted, the Chargers selected Allen at No. 76 overall, and he has proved to be one of the steals of the draft with 63 receptions for 931 yards and seven touchdowns.

Once considered a first-round talent, Allen saw his draft stock plummet because of a 40-yard dash time around 4.7 seconds while coming off a knee injury. At the NFL scouting combine, there were rumors of a failed drug test.

It turned out one of Allen's tests was red-flagged because he had too much water in his system, a sign of attempting to flush or mask a potential positive test. He took another test and passed it.

"Obviously he had the injury coming out, but I knew he was a talented player and he's shown that with the way he's playing," Raiders coach Dennis Allen said.

If the Raiders feel any remorse for passing on Allen, it has been lessened by the play of two receivers who weren't drafted at all.

Streater was undrafted out of Temple in 2012 and signed with the Raiders as a free agent. Holmes was undrafted out of Division II Hillsdale in 2010, joining the Dallas Cowboys before being released. He also was cut by New England before signing with the Raiders this past offseason.

With 54 receptions for 846 yards and three touchdowns, Streater is 154 yards shy of becoming the first Raiders receiver to gain 1,000 since Randy Moss in 2005.

Holmes has 17 receptions for 322 yards, all in the past five games. With Streater at 6-foot-3, 200 pounds and Holmes at 6-4, 210, the Raiders have two targets capable of making jump-and-catch plays and a quarterback in Matt McGloin who believes in giving them a chance to go up and get it.

"We come from pretty much a similar background," Streater said. "To be undrafted, you're already the underdog, and just to make the team is pretty big. Then to go out and start and make big plays, it's pretty cool to see."

"I think that's part of it, that we had to work our way up," Holmes said. "But at the same time I think our personalities are the same: to get the most out of every day so you can get better."

Since McGloin became the starter, Streater has 25 receptions for 423 yards and is averaging 16.9 yards per reception. Holmes, averaging 18.9 yards per catch, has made all his catches with McGloin as the starter.

With Denarius Moore (39 receptions, 615 yards) returning against the Kansas City Chiefs after missing three games because of a shoulder injury, the Raiders have three wide receivers with the capability of making plays downfield.

All go about their business without flash, in contrast to the diva stereotype associated with the position.

"Usually there are some characters in that group, but we have a good group of guys," Allen said. "They come in, they work hard, they really don't say a whole lot. They just try to do their job the best they can. From early in the year to now, I think that position group has been one of the bright spots and one of the more improved spots on our team."

  • Defensive tackle Vance Walker participated in practice for the first time this week, has one more concussion test to pass and will be a game-time decision as to whether he faces San Diego. Running back Darren McFadden (ankle) and safety Charles Woodson (ribs) participated fully and are listed as probable.

  • Linebacker Sam Montgomery, a third-round draft pick released by Houston and signed to the Raiders practice squad, injured his knee during his first practice Wednesday and has been placed on injured reserve.

    For more on the Raiders, visit the Inside the Oakland Raiders blog at ibabuzz.com/oaklandraiders. Follow Jerry McDonald on Twitter at twitter.com/Jerrymcd.

    SUNDAY'S GAME
    Raiders (4-10) at San Diego (7-7), 1:25 p.m. CBS