Hope everyone had a Merry Christmas. Now back to football.

In case you somehow forgot, Vikings quarterback Matt Cassel had four turnovers in Sunday's loss to the Bengals. We'll take a look at two this week that resulted in 14 easy points for the Bengals in the first half.

The situation: On the opening drive, the Vikings faced a 3rd and 6 at the Bengals' 45. They attempted to convert on pass play.

The reason: The Vikings received good field position on wide receiver Cordarrelle Patterson's return but gained just four yards on the first two run plays to running back Adrian Peterson. A three-and-out would be a devastating start given the drive began in their opponents' territory.

The result: Cassel fumbled while he was sacked. Bengals defensive end Carlos Dunlap recovered the loose ball and returned it 46 yards to the Vikings' 4. Bengals running back BenJarvus Green-Ellis scored two plays later.

"There are some things we could have done a little bit different to help us there," head coach Leslie Frazier said about the offensive line. "We could have done better and we did better as the game went on, but on that very first one we didn't handle it as well as we should have."

How it happened:

As Cassel drops back, the Bengals bring six defenders (marked with red "x"), but it shouldn't be a problem with seven blockers (marked with yellow "x"). Bengals linebacker Vontaze Burfict drops in coverage just as the ball is snapped.

Of course, just because the Vikings have more blockers doesn't mean Cassel will be assured good pocket protection. More on that in the next still, but clearly Cassel is under pressure. The Bengals are playing man coverage on the outside receivers and use Burifct to play underneath the slot receiver with a safety over the top.

So why exactly did Cassel feel heat with more blockers? First, running back Toby Gerhart (circled in yellow) did a good job picking up the linebacker blitzing from the A gap, but the right side of the line doesn't shift over. Center John Sullivan doesn't have anyone to block. Not only do the Bengals have one-on-one matchups across the line but there's a defender that goes untouched.

Cassel goes down and doesn't protect the football. It's bad enough that the Vikings wasted great field position on a short opening drive but this fumble was costly. He has to do a better job of holding on to the ball.

"We probably could have protected a little bit better," Frazier said. "There were some things we could have done a little bit better as an offense as a whole that maybe could have helped Matt some, but he still has to do a good job protecting the ball."

The situation: Down 14-7 with 10:10 left in the second quarter, the Vikings face a 3rd and two at their 20 and go with an empty backfield.

The reason: By this point in the game, Gerhart doesn't play again with his hamstring injury and Peterson wasn't effective dealing with his foot sprain. He had no gain on first down but Patterson's eight-yard rush gave the offense to a managable situation.

The result: Bengals linebacker Vincent Rey intercepted Cassel's pass and returned it 25 yards for a touchdown.

"Anytime you turn the ball over and you have drive start, in their case, from the four, that's tough," Frazier said. "The pick-six, those are tough to overcome on the road. You don't want to dig yourself a hole of any kind. You don't want to give people things on the road."

How it happened:

Just as the offense gets set, Burfict (circled in red) makes a late defensive adjustment on the coverage. The Vikings have three wideouts bunched on the right side with two on the left. The Bengals don't show blitz before or after Burfict's adjustment.

In fact, the Bengals just rush three and drop eight on the short yardage play because the Vikings have an empty back set. Cassel shifts his attention to the trips side on a three-step drop, so he'll likely get the ball out quickly.

Cassel stares down at Greg Jennings, Cassel's favorite target, on the play and hits his third step at this point. Rey (circled in red) notices Cassel's eyes and sits in that area with tight end Rhett Ellison cutting across.

Eyes don't lie in this case. Cassel throws to Jennings just as he breaks on the five-yard route and Rey reads it the entire way. He jumps the pass for the interception and scores easily.

"He'll be better this next week, but I don't if there was anything schematically that was a whole lot different," Frazier said. "We were doing some of the similar things we've done in the past. We didn't have the type of success."