Boise State added 18 transfers during the offseason from the Division I, Division II and junior college levels.  Several of the transfers are vying for immediate playing time as the Broncos gear up to leave the Mountain West for the Pac-12 this summer.  Eight players from last year’s team have already received an opportunity to land on an NFL roster in 2026, including fourth-round pick Kage Casey and undrafted free agents Matt Lauter and Zion Washington.  Here are two transfer portal additions that will help ease the Broncos’ NFL losses. Tyler Ethridge, senior, offensive tackle The Broncos have a massive hole to plug at left tackle with the loss of Casey, and Ethridge has the experience and talent to fill Casey’s shoes.  The 6-foot-3, 308-pound Ethridge logged 29 starts at left tackle for Division II Colorado State University-Pueblo and received all-Rocky Mountain Athletic Conference honors the last two seasons.…