Karl B DeBlaker, FR7226 AP
East Carolina's Davon Grayson (85) hauls in a pass in front of BYU's Trevion Greene (12) and Zayne Anderson (23) during the second half of an NCAA college football game in Greenville, N.C., Saturday, Oct. 21, 2017.

PROVO — BYU cornerback Trevion Greene is excited to take on everything the Fresno State offense throws at him Saturday, but perhaps one part of the Bulldog offense in particular.

Greene transferred to BYU from Chabot College last season, and before that played for East Palo Alto High, where he was teammates with current Fresno State wideout KeeSean Johnson. To say Greene was teammates with Johnson, however, is just the beginning of their connection.

"We're very close," Greene said. "We played on the same all-star team out of high school and we're still in contact. We're really close."

The two players will square off against each other Saturday, with Greene's playing time likely to increase in the wake of an injury to Troy Warner. The 6-foot-3 sophomore rotated reps with fellow sophomore Chris Wilcox last week against San Jose State, and is expected to do likewise against the Bulldogs this week.

It's a role Greene feels confident in.

"It hurt when (Warner) went down, but I knew it's time to step up and I'm ready for it," Greene said. "You bring your 'A' game to practice on Monday because this is all we got."

As for Johnson, he's a 6-foot-2 junior who leads Fresno State in receiving with 41 catches for 555 yards and four touchdowns this season. The two former high school teammates have carried on their conversations this week, and yes, there's been some trash talk exchanged.

"He definitely has (been talking), so it's going to be a good competition this week," Greene said. "He says he's going to do a lot of things, but I don't think it's going to happen. I trust me and I trust my guys, so we'll see."

SHELTON SEEING MORE TIME: Cornerback Michael Shelton has seen an uptick in reps as well, playing primarily as the team's primary fifth defensive back when the team opts for a nickel formation.

"He's honestly probably our best technician," said cornerbacks coach Jenaro Gilford of his 5-foot-8 junior cornerback. "Some games he may play a lot, and other games a little less, but the good thing about Shelton is he's always ready and always has a great attitude."

LEE IS WHAT'S LEFT: Gilford mentioned on Tuesday that the next guy up on his two-deep roster is 5-foot-10 senior Hiva Lee, should Wilcox, Greene, Shelton or Dayan Ghanwoloku go down with injury. Beyond Lee, Gilford mentioned the option of switching safety Micah Hannemann back to cornerback.

Twitter: @BrandonCGurney