NBA 2019-20: Rookie of the Year Power Rankings Week 15

#4 Zion Williamson - New Orleans Pelicans

Zion Williamson made an immediate impact for the Pelicans in Week 14

Zion Williamson has spent just 66 minutes on an NBA court, although the 19-year-old was nothing short of sensational during his first week in the league. In his debut against the Spurs, Williamson scored a ridiculous 17 straight points in the 4th quarter as he finished with 22 points in just 18 minutes of action for the New Orleans Pelicans.

After dropping 15 points in 21 minutes against the Nuggets, Williamson's minutes were upped to 27 against the Celtics - and the Duke product finished with 21 points and 11 rebounds as he recorded his first career double-double. Over his first three appearances, Williamson has averaged 19.3 points, 8.0 rebounds, and 1.7 assists in just 22.3 minutes - and the teenager is also shooting 66.7 percent from the field. He may have been an extremely late addition to the ROY race, although judging on his first week, Williamson is already in contention.

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#3 Tyler Herro - Miami Heat

Tyler Herro has made a huge impact from Miami's bench

The Miami Heat are currently dealing with somewhat of an injury crisis, and Tyler Herro has been able to step up over the past week. Herro played a substantial role in Miami's overtime win over the Wizards - finishing with 25 points on 5 of 7 shooting from beyond the arc.

Herro also played a career-high 40 minutes two days later against the Clippers, and while he struggled with his usually reliable three-point shot, he still managed to contribute 19 points while shooting just under 50 percent from the field. It was just Herro's fourth start of the season, and despite appearing from the bench for much of the campaign, the shooting guard is still averaging 13.3 points per contest while shooting 39.4 percent from three-point range.