Umberger, 22, has recorded 17 points (eight goals, nine assists) while centering a high-scoring line that includes fellow rookie Tony Voce (14 points) and Jon Sim (9 points), recently acquired from the Utah Grizzlies.
"The line's playing well," said Umberger, who at 6-foot-2 and 213 pounds brings a physical presence to his position. "I've got two good linemates."
Umberger had a major role in the Phantoms' 17-game winning streak, an American Hockey League record for consecutive victories. He recorded 16 of his 17 points during the streak.