NFL.com currently ranks White tenth overall at the position despite the veteran wide out posting five consecutive seasons with at least 83 receptions and 1153 yards. Despite his remarkable consistency—he has played at least 15 games every year since 2007—he is ranked behind younger, less proven commodities such as Randall Cobb, Demaryius Thomas and teammate Julio Jones (via NFL.com).
His fall in the rankings will bode well for you, as you may be able to steal White and receive great value for him in the middle rounds, as his average draft value is 35.98, via CBSSports.com. It also helps that White suffered a slight ankle sprain in a preseason game against the Baltimore Ravens back on August 15.
According to Ian Rapoport of NFL.com, White's injury is not considered serious (via Twitter):
The fact that Rapoport said that streak would continue if this were the regular season shows that the injury is not serious and should not slow down White.
Meanwhile, David Richard of CBSSports.com said that White will likely be held out of preseason action, but is expecting to be ready for the regular season:
White could miss some practices and potentially the rest of the preseason to keep his ankle clear of any further aggravation. He is expected to be ready for the Falcons' Week 1 game at New Orleans.
Despite the mildness of White's injury some fantasy owners will likely turn to other options early in draft, meaning that, come the fourth round or so, White will be there for the taking. Taking the Falcons' wide out that late in the draft is an absolute steal.
Most will probably try and grab his teammate Julio Jones early, but if White is healthy, he will record his usual numbers this season. White has great chemistry with quarterback Matt Ryan, who will be looking to prove he deserves the $103.75 million contract he signed this offseason.
White will be healthy and ready to go by the time the regular season rolls around. If he starts to fall later into the draft, do not wait for some one else to grab him. Make sure that you take him before your opponents do, as even in the third or fourth round, Roddy White is a steal.