FEBRUARY 28: The Rockets have officially signed Taylor and assigned him to the Rio Grande Valley Vipers, per Watkins. Houston now has one opening on its 15-man roster.

FEBRUARY 27: The Rockets are signing D-League guard Isaiah Taylor to their NBA roster, reports Calvin Watkins of ESPN.com. According to Watkins, Taylor will receive a three-year, non-guaranteed contract, and figures to remain assigned to Houston’s D-League affiliate for now.

Taylor, who went undrafted out of Texas last summer, signed a partially guaranteed contract with the Rockets and was with the club for training camp and the preseason. However, he didn’t earn a spot on the club’s regular-season roster, and joined the Rio Grande Valley Vipers as an affiliate player.

In 12 games for the Vipers, Taylor has averaged 21.1 PPG and 6.1 APG, showing an ability to get the free throw line (7.3 attempts per game) and to make outside shots (41.3% on threes).

Having traded away K.J. McDaniels and Tyler Ennis at the trade deadline, the Rockets had two open roster spots available — the team acquired Marcelo Huertas from the Lakers for Ennis, but waived Huertas shortly after trading for him. Taylor will fill one of those two roster openings as a developmental player, while the club figures to focus on adding a veteran with its other open spot.

According to Watkins (via Twitter), the Rockets don’t have serious interest in Andrew Bogut, who is expected to join the Cavaliers if he’s bought out by Philadelphia. Houston is looking to add a wing or another big man, says Watkins.