Fantasy football chat: Answering your questions about Week 15 lineups

To those of you playing in the fantasy football semifinals, congratulations for making it this far!

Now, there's no doubt that you have some difficult lineup decisions to make this week. Eddie Lacy has come to life these past few weeks—should owners start him with confidence against the Raiders today? The Broncos visit the Steelers today, so should owners of the Pittsburgh receivers temper their expectations? Will Matthew Stafford and the Lions take advantage against a Saints' defense that's among the NFL's worst? What about all of the backup running backs that are suddenly potential start options due to injuries?

SI.com's fantasy expert Michael Beller is here to answer all of that and any last-minute start or sit questions you may have. Tweet to him on the @SI_Fantasy Twitter account, or just follow along below, starting at 10 a.m. ET. For a more in-depth look at today's matchups, check out his Week 15 cheat sheet.

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