Earlier on Wednesday, Culver City, Calif., wide receiver Alex Jackson committed to Washington State and teammate Khalil Pettway followed up later in the day by pledging to the Cougars as well.
Pettway, a 6-foot-4, 204-pound three-star inside linebacker, had been committed to SMU but decided to open up his recruitment recently.
After talking with Washington State's new coaching staff and discussing options with Jackson, Pettway figured committing to the Cougars would be best.
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"I just actually committed to Washington State," Pettway said. "(Jackson and I) were talking about it for a minute like it would be something cool to do.
"It is a real big opportunity. I've been watching the Pac-10 since I was a kid and now to be a part of it is kind of humbling. The education is great in the Pac-12."
Pettway, rated No. 34 at inside linebacker in the 2012 class and No. 94 in the California state rankings by Rivals.com, said even though first-year coach Mike Leach will be more focused on the offense he's still excited to play for someone with such a big reputation.
And he's excited to play in the Pac-12.
"It's big," Pettway said. "I know he's more of an offensive kind of guy but I like where he's headed and his direction and I like what all the other coaches are saying."
The three-star said he plans to take his official visit to Washington State with Jackson sometime in January. He is not sure about any other trips.
SMU, San Jose State, Arizona, North Carolina State and West Virginia have also offered Pettway, who finished with 79 tackles in his senior season.