Martin, 37, played for the New York Knicks last season, averaging 4.3 points and 4.2 rebounds. He teamed with Bucks head coach Jason Kidd to lead the the New Jersey Nets to back-to-back NBA Finals appearances in 2002 and 2003.
He was the No. 1 pick in the 2000 draft by the Nets and has also played for the Denver Nuggets and Los Angeles Clippers. In 14 seasons, he has career averages of 12.5 points, 6.9 rebounds, 1.2 blocks and 1.2 steals.
Martin is expected to help fill the hole in Milwaukee's frontcourt. Center Larry Sanders has not played since Dec. 23 while dealing with personal issues. He rejoined the team this week, but said he is not ready to return to playing.
The Bucks are 19-18 and in sixth place in the Eastern Conference. They host the Minnesota Timberwolves on Friday.
- Paul Palladino