(Renton, WA)  --  The Seattle Seahawks' Thanksgiving night game with San Francisco is rated a tossup in Las Vegas.  The Seahawks gained ground on the Arizona Cardinals with last Sunday's 19-3 win at CenturyLink Field, and hope to build on that momentum when they visit the 49ers tomorrow night.  Both Seattle and San Francisco are seven-and-four heading into the contest.  Kickoff tomorrow is set for 5:30 p.m.