Kessler, a former two-sport student-athlete at Lafayette, received regional honors in soccer and baseball on College Hill. As captain of the men's soccer team in 1959, Kessler was named First Team All-Middle Atlantic Conference, First Team All-New Jersey/Pennsylvania/Delaware and Honorable Mention All-East. The Leopards went 8-1-1 on the pitch that season - the program's best-ever single-season record at that time.
On the diamond, Kessler was named Second Team All-District II as an infielder in 1959 after batting .419 - the fourth-highest average in single-season history at Lafayette. The College Hill Nine compiled an overall record of 59-31-1 during his career, including a trip to the College World Series in 1958. Kessler's career .396 batting average and .610 slugging percentage rank second and third all-time in program history, respectively.
Following his career on College Hill, Kessler played professional football for the Providence Steamrollers in 1962, where he was among the first to utilize in-step, "soccer-style" kicking now employed by virtually every NFL kicker.
Academically, Kessler went on to receive a Master's Degree at Harvard University in 1961 and earned a Doctorate of Education at Stanford University in 1969.
In addition to his career as an educator, Kessler also served as commissioner of the Cape Cod Baseball League - the nation's premier MLB-sanctioned summer league - and coached high school baseball. He is retired from his post as superintendent of Lake Forest Community High School District 115 in Illinois and currently resides in New Hampshire with his wife, Susan. They have three children: Scott, Cheryl and Mindy.