Which free-agent signing will have the biggest impact in the division? ESPN's NFC South reporters make their picks:

Jenna Laine, Bucs reporter: DeSean Jackson. One of the fastest, most explosive playmakers in the league (granted, that's if he doesn't slow down at age 30) heads to a Bucs team that has averaged 20 points a game on offense the past two seasons and hasn't had elite-level speed since Joey Galloway left after the 2008 season. I don't expect the Bucs to win a shootout against the Falcons or Saints anytime soon, but Jackson will test a Saints secondary that has come under a lot of scrutiny the past several years and a Panthers team still feeling the effects of Josh Norman's departure.

Vaughn McClure, Falcons reporter: DeSean Jackson. The Buccaneers found another weapon for Jameis Winston in the speedy Jackson, who previously played with the Washington Redskins. Now teams can't focus all the defensive attention on Mike Evans, who tied for second in the league last season with 12 touchdown receptions. As Falcons coach Dan Quinn said recently, Jackson has that rare combination of speed and ability to change direction. Jackson's career average of 17.7 yards per catch is the highest among active players. Bucs coach Dirk Koetter and general manager Jason Licht both said Winston needs to improve his deep-ball accuracy. Jackson should help the cause while opening things up for Evans, who uses his 6-foot-5, 231-pound frame to bully opponents.

David Newton, Panthers reporter: This one was easy: Tampa Bay's addition of DeSean Jackson. Jameis Winston now has a premier speed receiver to play opposite Mike Evans. Jackson will stretch the field and open up the offense in a way aging Vincent Jackson couldn't. That will benefit Winston, who completed only 26.7 percent of his passes that traveled 20 or more yards in 2016. It also will open up the running game with re-signed back Jacquizz Rodgers. Tampa Bay ranked 18th in the NFL in scoring last season, with 22.1 points a game. Until the defense improves significantly, the Bucs need more scoring power to keep pace with reigning NFC South champion Atlanta, which led the league in scoring last season, with 33.8 points a game. It's doubtful that the Falcons will drop significantly with all their firepower.

Mike Triplett, Saints reporter: DT Dontari Poe, Falcons. Talk about the rich getting richer. The Saints were the NFC South team most in need of dynamic difference-makers on defense. But they got one-upped by the team they're chasing in the division standings. Poe (listed at 6-foot-3, 346 pounds) is a force up the middle against the run and the pass. The two-time Pro Bowler was ranked fifth on ESPN's list of the top 150 free agents, and he should help take that young, rising Falcons defensive line to another level (DE Vic Beasley led the NFL with 15.5 sacks last year; now even more quarterbacks will be flushed out of the pocket into his path). If the Saints wind up adding cornerback Malcolm Butler in a trade with the New England Patriots, Butler could be in the argument, along with Poe and Buccaneers receiver DeSean Jackson. But for now, at least, the defending NFC South champs are winning this category.