Growing up, Kosmalski studied books on the Boston Celtics under coach Red Auerbach, and was impressed that the team only used seven plays.
[5] He said that he met Stephen Curry at a summer camp and watched him in high school but was not actively involved in his recruiting to Davidson.
[4] Responsible for developing big men, he helped De'Mon Brooks and Jake Cohen be named the 2012 Southern Conference player of the year by the coaches and media, respectively.
[5] When he arrived, Kosmalski envisioned Swarthmore, which had not won a conference title since 1951, becoming one of the best Division III programs and sent letters to this effect to recruits.
Before the 2015–16 season, Koswalski recruited Swarthmore's first All-American, Cam Wiley, and the program showed immediate improvement, winning 22 games.
After listening to a TED talk by Shawn Achor, author of “The Happiness Advantage”, Kosmalski decided to apply his principles of positivity leading to a more productive work environment.
[10] The team's leading scorer and rebounder was Zac O’Dell, who published an article in the journal Environmental Science & Technology entitled “In Situ Quantification of Silver Nanoparticle Dissolution Kinetics in Simulated Sweat Using Linear Sweep Stripping Voltammetry.”[1] The team finished the season 28–1 after the remainder of the NCAA Tournament was cancelled due to the coronavirus pandemic.
Kosmalski was named the NCAA Division III National Coach of the Year, which he called a "team honor".
Kosmalski's wife Lauren Santi was a former cheerleader at the University of Alabama and also worked in Davidson's office of sports information.