Grossman joined a 19U summer league where he started pitching full-time. He recalls throwing two consecutive no-hitters, and he was so dominant that the Pittsburgh Pirates signed the 18-year-old to a contract, which was quickly voided when his father found out about it.
"I was only 18 and it wasn't legal at the time for me to sign that by myself," Grossman said. "That was definitely a good thing."
As if Grossman's path to becoming a Maryland pitcher wasn't wild enough, there was one more hurdle.
Grossman was also an accomplished football player who was set to play quarterback at William & Mary under head coach Lou Holtz.
"I was always on the football path," Grossman said. "But once I started pitching, I couldn't give it up."
Grossman's decision then turned to where he should play college baseball. A couple of guys from his summer league were Terps, and they got Grossman excited about Maryland.
"I knew that Maryland had a good and up-and-coming baseball team," Grossman said. "I basically sent out feelers and Coach (Elton) Jackson said 'Yeah, we want you.' Shortly after that, I was on campus."
Once he was officially a Terp, Grossman excelled on the baseball diamond. His junior season in 1972 was his best, and he was named First Team AACBA All-American and ACC Player of the Year. During that year, he threw a pair of no-hitters just two weeks apart, the first ones in program history besides Dick Reitz's perfect game in 1959.
The first no-hitter came on March 25, 1972, in a 9-0 win against Syracuse. Grossman doesn't like to take too much praise for that one, chalking a lot of his performance to the weather conditions on that day.
"That game wasn't fair to anyone," Grossman said. "It was so cold outside, no one wanted to swing the bat."
The second no-hitter, however, still brings a smile to Grossman's face to this day.
It came at North Carolina in a game where the Tar Heels were dedicating their brand new stadium. Yet, on what was supposed to be a day of celebration for North Carolina and its baseball program, not one of its batters was able to get a single hit against Grossman in Maryland's 6-0 win.
"That's kind of perfect, isn't it?" Grossman asked with a laugh.
The no-hitters weren't the only memorable games for Grossman that year.
His very last game in a Maryland uniform came at Navy. The Terps were losing by three runs in the eighth inning when Grossman, who frequently batted because there wasn't a designated hitter at the time, stepped to the plate and walloped a grand slam to put Maryland back in front by a run.
Grossman's job wasn't done yet, however.
"I came back (on the mound) and somehow got the (complete-game) win," Grossman said.
Grossman is very proud of his no-hitter records and all he accomplished as a Terp. However, he also wants to ensure his teammates get plenty of credit.
"You don't get to accumulate any kind of records without good teammates," Grossman said. "It's just impossible. I was very fortunate I fell into a time when there were a lot of good players at Maryland."