It's getting to crunch time in fantasy football, and many leagues are currently already into the second round of their fantasy playoffs this weekend. If you are in need of a strong running back plug and play option for this weekend, here are two running backs available in most leagues that are viable options at the running back position or the flex spot this week.

New England Patriots RB Brandon Bolden - The Patriots have officially place running back LeGarrette Blount on season-ending injured reserve, and head coach Bill Belichick is likely to fill his role with Bolden this Sunday. Bolden is a clear start in any fantasy league and is coming off a season-high 16 carries against the Houston Texans on Sunday Night Football. While Bolden has only seen 35 carries this season, he will have a dramatically increased load against the Tennessee Titans and has a favorable matchup against the 17th rushing defense in the NFL. Running back James White is likely to see a majority of the snaps on third down passing situations, and he is a strong option in point per reception leagues. While White will be in the backfield in passing situations, expect Bolden to get a majority of the carries Sunday. Bolden will probably be New England's top running back in goalline situations, and at 5-foot-11, 220-pounds, he can break through tacklers in the redzone.

Jacksonville Jaguars RB Denard Robinson- Rookie running back T.J. Yeldon is officially listed as doubtful with a knee injury, and running back Denard Robinson is expected to take over the lead role behind quarterback Blake Bortles. Robinson is in his third season in Jacksonville, and he has made the most of his opportunities. The Jaguars running back is averaging 4.7 yards per carry but has only scored one touchdown this season. If Yeldon can't go Sunday, Robinson is a clear start at either the second running back position or flex spot this week. Robinson looks to be a strong start in PPR leagues, and he has caught eight passes for 68 yards this year. The Jaguars third-year running back is coming off a season-high 75 yard rushing game and is expected to be see a ton of touches Sunday with Yeldon likely out. The Jaguars face the Falcons on Sunday, and Atlanta is giving up 105.6 rushing yards to opponents per game this year.