Arnold was inducted into the National College Baseball Hall of Fame in Lubbock, Texas in March 2015.
Following the 1968 college season, the Houston Astros selected Arnold in the third round (55th pick overall) of the 1968 MLB Draft.
[5] In seven seasons, he led the Mocs baseball team to an overall win–loss record of 316–69 (.821), four Sunshine State Conference (SSC) championships (1980, 1981, 1982, 1983), six consecutive appearances in the Division II College World Series, two Division II national championships (1978, 1981) and two national second-place finishes (1979, 1982).
[8] In eleven seasons, Arnold coached the Gators to an overall win–loss record of 434–244–2 (.640), two Southeastern Conference (SEC) championships (1984, 1988), three SEC tournament titles (1984, 1988, 1991), seven appearances in the Division I baseball tournament, and the program's first two appearances in the College World Series (1988, 1991).
In four seasons managing Single-A baseball, he compiled a record of 179–119 (.601), his Yankees teams finished first or second in the standings three of four years, and won the league championship twice.