The 1980s were certainly the golden decade for the Penn men's lacrosse program, and it would be an understatement to say that Bill Morrill played a role in that success.

Morrill was a four-year letterwinner on attack from 1982-85, earning first-team All-Ivy each of his last three years. That makes him one of just two Penn players to be so honored. Morrill was honorable mention All-America in 1983 and 1984, and culminated his career with third-team All-America honors in 1985. When Morrill graduated he was Penn's all-time leader in goals (98), second all-time in points (164), and tied for third all-time in assists (66). Twenty-five years later, those numbers stand fifth, sixth and seventh, respectively, on the all-time lists.

As a freshman in 1982, Morrill was second on the team in goals (15) and third in both assists (7) and points (22). In 1983, he led Penn in goals (33) and points (47), and was fourth on the team with 14 assists. Morrill led Penn in assists in 1984 (19), and was second on the team in goals (21) and points (40). In 1985, he led the Quakers with 26 assists, tied for the team lead with 55 points, and finished second with 29 goals.

Morrill's teams set the standard for what would be an unprecedented run of success. The arrival of Tony Seaman as head coach coincided with Morrill's sophomore season; the 1983 Quakers tied Cornell for their first Ivy League title that spring, then went a perfect 6-0 to win their first outright championship in 1984. Both of those teams advanced to what was then an eight-team NCAA Championship field, losing in the quarterfinal round each time (11-8 to eventual champion Syracuse in 1983, 8-7 to Army in 1984), as did the 1985 team which fell to eventual runner-up Syracuse in the first round. Those three Penn teams went a combined 32-9 overall, 15-3 in Ivy play.