"Brad has a wealth of experience after serving for 16 years as a Division I assistant and six years as a head coach at the junior college level," Martin said. "He is a strong recruiter and excellent bench coach."
Underwood joined the Kansas State staff in May 2006 as the director of operations for then-head coach Bob Huggins. After serving in that capacity for the 2006-07 campaign, Underwood was promoted to assistant coach prior to the 2007-08 season, Martin's first as the head coach at KSU. At Kansas State, Underwood helped coach several all-conference players and two All-Americans, while during his time as an assistant and associate head coach for Kansas State, the squad won at least 21 games each season, while finishing fifth or higher in the Big 12 each year.
During his first season as an assistant (2007-08), Underwood helped guide the Wildcats to a 21-12 record and third-place finish in the Big 12 with a mark of 10-6 in league contests, which marked the program's best finish since the inception of the league. The squad advanced to the NCAA Tournament, and the program earned its first NCAA Tournament victory since the 1988 campaign.
Kansas State earned an at-large bid to the Postseason NIT during the 2008-09 campaign, and the 2009-10 team followed with one of the best seasons in program history, compiling a school-record 29 wins, en route to the program's first NCAA Tournament Elite Eight appearance in over two decades. The Wildcats defeated six ranked opponents that season, and concluded the year ranked in the Top 10 in both the ESPN/USA Today Coaches Top 25 Poll (No. 7) and the Associated Press Top 25 Poll (No. 7).
Kansas State advanced to the third round in the NCAA Tournament during the 2010-11 season, as the squad posted a 23-11 record, including a 10-6 mark in league play to finish third in the Big 12. Underwood received much acclaim during the 2010-11 season, as Martin took his suggestion of adjusting the offensive scheme in early January. The result saw KSU rally, posting nine wins in its last 11 regular-season games to earn the school's fifth-consecutive 20-win season.
The 2011-12 campaign saw Kansas State once again advance to the NCAA Tournament third round, concluding the season with a 22-11 overall record. The Wildcats posted a 10-8 mark in Big 12 play to finish fifth, which made Kansas State and cross-state rival Kansas as the only Big 12 schools to receive a bye into the quarterfinals of the Phillips 66 Big 12 Championship in each of the last six seasons, with Underwood part of the KSU staff each time.
Prior to his time at Kansas State, Underwood served as a head coach at the junior college level at Dodge City (Kan.) Community College (1988-92), and Daytona Beach (Fla.) Community College (2003-06). In between those stints, Underwood served as the top assistant at Western Illinois (1992-2003). Underwood began his coaching career as a graduate assistant at Hardin-Simmons during the 1986-87 campaign.
Underwood earned his bachelor's degree in radio and television communications from Kansas State in 1986, where he was a two-year letterman for the Wildcats (1984-86). A native of McPherson, Kan., he and his wife, Susan, have one son, Tyler, and two daughters, Katie and Ashley.