McCree and Tyler combined for 13 catches, 82 yards and a touchdown in the Labor Day win over Miami. The Terps host No. 18-ranked West Virginia on Saturday.
"The expectation of our program is for our student-athletes to conduct themselves in the proper manner academically, athletically and socially," coach Randy Edsall said in a prepared statement. "Unfortunately, Quintin and Ronnie fell short of these expectations."
There is no timetable for their reinstatement.
McCree caught seven passes for 39 yards against Miami and Tyler had six catches for 43 yards and a touchdown.
Heather Dinich is the ACC college football blogger for ESPN.com.