McCaslin steadily ascended the coaching ranks at UNO on the defensive side of the ball, becoming defensive line coach in 2000 and defensive coordinator in 2005. He gained the title of associate head coach in 2007. McCaslin had hopes of eventually succeeding Behrns as head coach, reflecting later that "I felt like I was on a path...It was definitely a desire of mine to try and become the head coach down the road."[4] Keen joined the staff in 2008 as offensive coordinator.[1] McCaslin's career at UNO came to a halt in the spring of 2011 when the school decided to transition to NCAA Division I and join the Summit League. As part of this change, UNO dropped football and wrestling.[5]
Eastern Michigan competed in the Mid-American Conference (MAC) of the Football Bowl Subdivision (FBS). McCaslin inherited a defense which had ranked in the bottom quarter of the FBS the previous year.[11] Eastern Michigan struggled on both sides of the ball during Creighton's first two years, to the point that the faculty union and student government would question the viability of continuing the program in early 2016.[12] The 2015 team had the worst defense in FBS. Eastern fired McCaslin after the season; Neal Neathery, another former Drake defensive coordinator, replaced him.[13][14]
Buffalo and Benedictine
The University at Buffalo, also a school in the Mid-American Conference, hired McCaslin as a defensive analyst for the 2016 season under head coach and former fellow UNO assistant Lance Leipold.[3] After two seasons in Buffalo, McCaslin accepted the heading coaching job at Benedictine University in Lisle, Illinois, which competed in the NCAA Division IIINorthern Athletics Collegiate Conference. In his one season at Benedictine, McCaslin posted a 3–7 record. Following the season, McCaslin resigned and returned to Buffalo as defensive tackles coach.[15]
Personal life
McCaslin married Erin R. Heikes in 1998.[16] They have three children.[6]