Fantasy football sit/start advice, Week 7: Giants vs. Cowboys

Through two weeks, the New York Giants looked terrible. Then they ran off three straight wins and looked like world-beaters. And then they bounced back with a disastrous Week 6, so we really don't know what yo expect out of the team. Meanwhile, the Dallas Cowboys lost in Week 1, but have rattled off five straight wins, including a Week 6 win over the Seattle Seahawks. And Sunday, they play each other.

The Giants will be without running back Rashad Jennings for the second straight week Sunday, as he deals with a knee injury. The Cowboys list quarterback Tony Romo, running back DeMarco Murray and wide receiver Dez Bryant all on the week's injury report, though all three are expected to be fully active Sunday.

Start 'em: Two straight awful games for Larry Donnell have really disappointed, but he got so many targets early in the season that you have to expect that to happen again.

Start 'em?: Since his 32-point game against Washington, Eli Manning has 22 fantasy points -- in two games combined. He's wildly inconsistent, though his upside still makes him a reasonable QB2. ... Andre Williams didn't inspire confidence in his first game as the Giants' starter. His lack of pass-catching ability will hinder his value, though he still looks like a strong flex play this week. ... The absence of Victor Cruz makes both Rueben Randle and Odell Beckham Jr. more interesting -- I'd prefer to keep them out of my lineup until we see how it shakes out, but anyone using them would have a defense for it.

Sit 'em: In the Giants' bad games, Josh Brown has been terrible -- four points in three games. In their good ones, he's been great -- 36 in three. He's too dicey to run out there. ... The Giants' defense has a combined four points the last two weeks. Against a good Dallas offense, that's a stay-away.

Start 'em: He struggled to start the season, but Tony Romo has been decent or better in every game since Week 2. He's a fine starter. ... Eventually, the Cowboys are going to have to let off DeMarco Murray's workload, if only for a game, and since he's dealing with injury, this might be the week. It's irrelevant, though; as long as he's active, he's in your lineup. ... Dez Bryant ended a four-game streak of double-digit fantasy points in Week 6, but he's still a top option. ... Dan Bailey has been one of the league's top kickers. Some things don't change.

Start 'em?: Since a two-point Week 2, Terrance Williams have averaged 12 points a game, and he has at least seven points in five of six games. He's a strong flex play. ... We're still waiting for a big game from Jason Witten, but he's been improving as the season has gone on. He's a high-end TE2 at worst.

Start in every league: Larry Donnell, Tony Romo, DeMarco Murray, Dez Bryant, Dan Bailey
Start if you're desperate: Eli Manning, Andre Williams, Rueben Randle, Odell Beckham Jr., Terrance Williams, Jason Witten
Bench: Josh Brown, New York defense, Dallas defense