Another dominant performance Saturday has an Alabama player climbing up draft boards for next year. No, we aren’t talking about college football. Crimson Tide point guard Collin Sexton has burst onto the college basketball scene with a first month that’s featured an array of big-time shots and outstanding efforts. Sexton is averaging an SEC-best 21.8 points per game (on 47.1 percent shooting) after scoring 30 during an 88-82 loss at Arizona on Saturday, when he made 15 of 16 shots from the free throw line and knocked down three 3-pointers. “We can only learn from this,” Sexton said afterward. Opponents are learning the difficulty of slowing the 6-foot-3 dynamo. Sexton has scored at least 20 points in six of the nine games he has appeared in and also is averaging 3.6 rebounds and 3.3 assists. A couple of possessions early in the second half against Arizona showed why some draftniks consider Sexton the best point guard who could be available in the 2018 NBA Draft.