As the Buffs prepared to welcome a host of official visitors to campus beginning Friday, in the preceding days, a handful of notable recruits got to check out campus on an unofficial basis.

Local offensive lineman Hayden Treter, a Class of 2024 prospect out of Cherry Creek High School, dropped by Colorado on Thursday.

Treter, a 6-foot-6, 300-pound player who alternates between guard and tackle for the Bruins, has seen his recruitment begin to intensify of late.

Kyle DeVan offered him on behalf of the Buffaloes back on June 1, and since then, Washington State has done the same, while Treter also was able to get out and visit San Diego State unofficially, as well.

Other than the Buffs and Cougs, Iowa State and CSU have also offered Treter.

Wesley Greaves, a 6-foot-2, 185-pounder out of College Station (Texas A&M Consolidated) Texas, is a recent recipient of an offer from the Buffs, courtesy of Phil McGeoghan.

Greaves has offers from Army, Navy, Air Force, Penn, Princeton, Harvard and Yale, to name a few.

That's not to say that he hasn't attracted any Power Five interest, as Utah joins Colorado in that regard.

After picking up an offer from Southern Methodist back in late February, Greaves verbally committed to the Mustangs at the end of March. However, in April 11, he re-opened his recruitment.

Since then, he's announced 14 new offers, Colorado included.

Zahir Rainer is nearing 20 offers thus far, with time to spare as far as his recruitment goes.

Arkansas, Indiana, Maryland, Mizzou, Penn State and Syracuse are notable on his current list of opportunities, while Virginia and Rutgers are known to be in some communication with him, as well.

Colorado's Brett Maxie extended an offer to the 5-foot-10, 180-pounder in early June, with Rainer heading out to Boulder Thursday for an unofficial visit.

The three-star prospect out of Richmond (Trinity Episcopal) Va. is projected to play safety at the next level.