 Complete the following phrase:  The Mavericks have three retired jersey numbers: the number 12 jersey worn by Derek Harper, the number 15 jersey worn by Brad Davis, and the number 22 jersey worn by Rolando Blackman. Davis, who played 12 seasons with the Mavericks until his retirement in 1992, had his number 15 jersey retired by the franchise in November 1992. Blackman, who played 11 seasons with the Mavericks after being selected by the team in the 1981 draft, had his number 22 jersey retired in March 2000. Harper, who played parts of 12 seasons in two stints with the Mavericks starting with the 