LOS ANGELES — Terence Crawford, the consensus best pound-for-pound boxer in the world, defeated Israil Madrimov by unanimous decision on Saturday night to become a four-division champion. Crawford won the WBA super welterweight title in his first fight at 154 pounds, taking it 116-112, 115-113 and 115-113 on the judges’ scorecards. Crawford (41-0, 31 KOs)
