I'm taking the niners + points. In the niner's last 6 meetings in Arizona since 02', 5 of those meetings have been decided by less than 9.5 points.
Date Score Line O/U
Sep 7, 2008 ARI 23, @SFO 13 ARI, -2½ 42.5
Nov 25, 2007 SFO 37, @ARI 31 ARI, -10½ 37.5
Sep 10, 2007 ARI 17, @SFO 20 SFO, -3½ 47.0
Dec 24, 2006 ARI 26, @SFO 20 SFO, -4 45.0
Sep 10, 2006 SFO 27, @ARI 34 ARI, -10 43.5
Dec 4, 2005 ARI 17, @SFO 10 ARI, -3 44.0
Oct 2, 2005 SFO 14, @ARI 31 ARI, -3 44.0
Dec 12, 2004 SFO 31, @ARI 28 ARI, NL 0.0
Oct 10, 2004 ARI 28, @SFO 31 ARI, NL 0.0
Dec 7, 2003 ARI 14, @SFO 50 ARI, NL 0.0
Oct 26, 2003 SFO 13, @ARI 16 ARI, NL 0.0
Dec 21, 2002 SFO 17, @ARI 14 ARI, NL 0.0
Oct 27, 2002 ARI 28, @SFO 38 ARI, NL 0.0