While the activity level of the transfer portal continues to rise, the number of impact players presumably should grow.

Only a select group of additions, however, will legitimately have a major influence on an offense's level of success in 2023.

Naturally, the obvious choices are quarterbacks such as Wake Forest-to-Notre Dame mover Sam Hartman. In the interest of not highlighting a bunch of signal-callers, though, we've selected three QBs and rounded out the list across the other positional groups on offense.

The list is subjective but includes players who can solidify a contender, engineer a philosophical change or provide a rapid one-year turnaround at their position.

Devin Leary, QB, Kentucky

During the 2021 season, Devin Leary amassed 3,433 passing yards at a solid 8.0 per attempt with 35 touchdowns to five interceptions. He guided North Carolina State to a superb 9-3 record.

Unfortunately for Leary and NC State, the 2022 campaign wasn't as kind. Although the Wolfpack went 5-1 in his starts, Leary's efficiency dipped considerably before a torn pectoral muscle ended his season. He ultimately chose to transfer and jumped from the ACC to SEC.

Kentucky landed him to replace Will Levis, a potential first-round pick in the NFL draft despite his inconsistencies in college.

And the 'Cats have an encouraging outlook for Leary.

Barion Brown, Dane Key and Tayvion Robinson each tallied at least 37 receptions for 497-plus yards, combining for 13 touchdowns. They're all returning to UK, along with 20-catch tight end Jordan Dingle.

Kentucky isn't suddenly a threat to dethrone Georgia in the SEC. But after a 7-6 campaign that included 20.4 points per game, the 'Cats should improve considerably as Leary assumes the QB1 spot.