The Rams show strong preseason form (3-0) and hold recent head-to-head momentum (42-26 win in November 2025). Their defensive additions, including Myles Garrett, offset the absence of Aaron Donald for this game. The 49ers face compounding injury damage: season-ending loss of starting DT Alfred Collins plus multiple starters (Bosa, Kittle, Greenlaw) managing injuries. The Rams' experienced quarterback Matthew Stafford faces a 49ers defense weakened in depth at defensive line. However, Week 1 carries execution risk—travel fatigue, player conditioning, and early-season adjustments affect both teams equally. The independent model rates Rams 64.07%, slightly below market's 68% implied probability. Current odds at 1.48 offer modest value alignment with the model estimate but lack compelling edge given Week 1 uncertainty.