By Frankie Taddeo Target these four player props for Sunday’s Week 5 NFL action. As the NFL season progresses, oddsmakers begin to tighten point spreads. This makes it more difficult for bettors to build bankrolls. Just look at the Week 5 betting board. Six of the this week’s 16 games feature lines at SI Sportsbook of seven points or more, including the largest spread of the season at 15.5 points (Steelers-Bills). When faced with difficult decisions on NFL games, where point spreads can wreak havoc, bettors can often find more value investing in Player Proposition wagers. For example, betting …