Jake Long said he is getting better each day in recovering from a sprained MCL, leading his coach to believe the star left tackle will be on the field against the Houston Texans come Sept. 9.

It's early, but we've already seen a handful of newbies showing significant promise. Here are six rookies, including Robert Griffin III, who appear ready to help their respective teams right away.

2012 NFL Free Agents List

2011 NFL Free Agents List

The Miami Dolphins plan to sign veteran wide receiver Kevin Curtis, who overcame cancer this year and a knee injury last year, for the rest of the 2010 season, according to a league source.