Allar finished as a semifinalist for the award a season ago.
Ross and Peña are two of the three new receivers from the transfer portal.
This is the running back duo's third consecutive season on the award's preseason watch list.
Duzansky has now appeared on the Mannelly Award watch list for two consecutive seasons.
The winner will be announced live on ESPN on December 12.
"These guys are our playmakers. I'm going to set things up for them to make plays."