just looking at past drafts, and I know hindsight is brilliant, but the past drafts, RB's taken before 15...
2010 - Spillar & Matthews
2009 - Moreno
2008 - McFadden & Jonathon Stewart
2007 - Peterson & Lynch
2006 - Bush
2005 - Ronnie Brown, Benson, Williams
2004 - None, but Steven Jackson went at 24
2003 - again none, but Willis McGhee & larry Johnson went at 23/24
2002 - William Green & TJ Duckett went at 26/28
2001 - LT at 5.
Now, out of all of them, only LT, Steven Jackson, & AP have had so far stellar careers. A few have had solid careers, but if ingram is not at least equal to most of them at the end of his college career, then I give in....
At 15, he would be a terrific pick.