All of this talk about "Brown reminds me of this guy and that guy" made me want to see what the stats said about his situation...
Let's look at some RBs that had similar rookie years as Ronnie Brown and see what happened in their second year. I wasn't sure what criteria to use when talking about "similar years," so I just took all RBs who had between 800-1000 rushing yards in their rookie season (Brown had 907) for comparison's sake. If you can think of a better criteria for comparison, let me know.
Over the past 25 years, 14 RBs met the criteria set forth.
NAME POS YR AGE EXP G RSH RSHYD YD/RSH RSHTD REC RECYD YD/REC RECTD FANT PT1 Ronnie Brown rb 2005 24 1 15 207 907 4.38 4 32 232 7.25 1 143.902 Julius Jones rb 2004 23 1 8 197 819 4.16 7 17 109 6.41 0 134.803 William Green rb 2002 23 1 16 243 887 3.65 6 16 113 7.06 0 136.004 Marcel Shipp rb 2002 24 1 15 188 834 4.44 6 38 413 10.87 3 178.705 Ricky Williams rb 1999 22 1 12 253 884 3.49 2 28 172 6.14 0 117.606 Warrick Dunn rb 1997 22 1 16 224 978 4.37 4 39 462 11.85 3 186.007 Fred Lane rb 1997 22 1 13 182 809 4.45 7 8 27 3.38 0 125.608 Antowain Smith rb 1997 25 1 16 194 840 4.33 8 28 177 6.32 0 149.709 Rodney Thomas rb 1995 22 1 16 251 947 3.77 5 39 204 5.23 2 157.1010 Bam Morris rb 1994 22 1 15 198 836 4.22 7 22 204 9.27 0 146.0011 Leonard Russell rb 1991 22 1 16 266 959 3.61 4 18 81 4.50 0 128.0012 Johnny Johnson rb 1990 22 1 14 234 926 3.96 5 25 241 9.64 0 146.7013 Emmitt Smith rb 1990 21 1 16 241 937 3.89 11 24 228 9.50 0 182.5014 Thurman Thomas rb 1988 22 1 15 207 881 4.26 2 18 208 11.56 0 120.90Now let's look at how each one of these guys did in their second year:Julius Jones - 257/993/3.9/5, 35/218/6.2/0
Missed time due to injury during both years
William Green - 142/559/3.9/1, 10/50/5.0/0
Only played 7 games due to disciplinary reasons IIRC (possibly injury, too)
Marcell Shipp - 228/830/3.6/0, 30/184/6.1/0
Cardinals were ridiculously bad on offense, scoring a league-low 225 points. Emmitt was on this team but only got 90 carries playing in 10 games. How anyone can touch the ball 258 times and not accidentally find the end zone is beyond me.
Ricky Williams - 248/1000/4.0/8, 44/409/9.3/1
Was having a great season before getting hurt in the 10th game
Warrick Dunn - 245/1026/4.2/2, 44/344/7.8/0
Alstott got 215 carries and 8 TDs
Fred Lane - 205/717/3.5/5, 12/85/7.1/0
Panthers were the third worst rushing team in the NFL, Biakabatuka got 101 carries
Antowain Smith - 300/1124/3.7/8, 5/11/2.2/0
After splitting carries with Thurman Thomas his rookie year, Antowain got the lion's share in year two.
Rodney Thomas - 49/151/3.1/1, 13/128/9.8/0
Hello, Eddie George. Goodbye, Rodney Thomas.
Bam Morris - 148/559/3.8/9, 8/36/4.5/0
Erric Pegram got most of the work.
Leonard Russell - 266/959/3.6/4, 11/24/2.2/0
Only played in 11 games, split time with Jon Vaughn and John Stephens. Yikes.
Johnny Johnson - 196/666/3.4/4, 29/225/7.8/2
Split time with Anthony Thompson.
Emmitt Smith - 365/1563/4.3/12, 49/258/5.3/1
Welcome to Greatness
Thurman Thomas - 298/1244/4.2/6, 60/669/11.2/6
No explanation needed.
Barring injury, I think Antowain Smith's season is the floor for Brown (with more receptions), and I think his ceiling is just a little shy of Emmitt's season.