Bob Riehm turned the Southern Oregon University wrestling program into a national power.

Riehm presided over the Raider men's wrestling team for 25 years, won three national championships, and mentored 100 NAIA All-Americans. His legendary run as a coach and educator at the school began in 1969. Today, his legacy lives on in the gymnasium named for him, Bob Riehm Arena, at SOU's Lithia Motors Pavilion.

Riehm's first Southern Oregon team went 7-7 in dual matches, but the Raiders were never in danger of finishing .500 or worse for the remainder of his tenure. With a 270-71-2 career record, he stands alone atop the Raider wins list and is still responsible for nearly half the wins accumulated in program history (568).

His ninth season, the 1977-78 campaign, brought the school's first-ever national team title. Five years later, the Raiders won another – the culmination of their first undefeated season, a 12-0-1 march capped by back-to-back wins over Oregon and Oregon State.

Riehm's Raiders hung their third NAIA championship banner following the 1993-94 season, his last as head coach. All told, he was twice named NAIA Coach of the Year, coached 13 individual national champions, won 12 regional team titles, and posted 18 top-eight national finishes.

In 1988, Riehm was inducted to the NAIA Hall of Fame. He's also a member of the SOU Sports Hall of Fame, to which four teams he coached have also been inducted.

On Feb. 5, 2011, the gymnasium inside McNeal Pavilion officially became Bob Riehm Arena at a dedication ceremony that marked the conclusion of a fund drive in Riehm's honor. Led by the Riehm family, it raised over $100,000 that went toward scholarships and a new wrestling mat, sound system and scoreboards for the gym.

On Feb. 5, 2022, it was announced that Riehm’s estate had made a $3 million donation to SOU, the largest-ever single gift to the university. A third of the gift will endow the men's wrestling head coach position at SOU, which will be named for Riehm, and two-thirds will fund scholarships for the team's wrestlers.

A native of Britt, Iowa, Riehm wrestled at University of Iowa and graduated in 1960.