Jefferson Hills police say the 20-year-old Boyd was pulled over around 2:30 a.m. Friday and underwent breathalyzer and blood tests. Jefferson Hills Police Sgt. Kevin King says the results are pending and no charges have been filed.
"There is suspicion of alcohol, but there are no results of any test at this point," King told the Pittsburgh Post-Gazette. "At this point no charges have been filed and no results of any toxicology tests at this time."
KDKA TV in Pittsburgh had reported that Boyd was arrested after taking a breathalyzer test. The station cited police paperwork, which said Boyd told the officer who pulled him over he was drinking after the NBA Finals game between Cleveland and Golden State on Thursday night ended and that he "had two shots."
"Tyler's situation is both serious and disappointing," Pittsburgh coach Pat Narduzzi said in a statement. "We have high expectations for the young men in our program, on and off the field. Tyler understands that and knows he must be responsible for his actions. Certainly he will be held accountable to our internal standards of discipline and behavior."
Boyd, a potential first-round pick in 2016, was a first-team all-ACC selection last year after catching 78 passes for 1,261 yards and eight touchdowns. He was responsible for an FBS-high 52 percent of the Panthers' receiving yards, according to ESPN Stats & Information.
Boyd became the first player in ACC history to go over 1,000 yards receiving his freshman and sophomore seasons. He and Larry Fitzgerald (2002-03) are the only players in Pittsburgh history to achieve two 1,000-yard receiving seasons.
The Associated Press contributed to this report.