When the Kansas City Chiefs announced the signing of quarterback Nick Foles last week, the reaction was mostly positive from "Chiefs Kingdom." While the acquisition of Foles could pan out, there are some major question marks for me when it comes to the former Eagles and Rams quarterback.

First off, though, let's remember that Foles' role will be as a backup behind starter Alex Smith. This team is Smith's to lead -- something drastic would have to happen for Foles to take over the starting spot without an injury to Smith.

But the Chiefs acquired Foles to serve one purpose: be ready in the event that Smith gets hurt or plays just horrid football. After all, that is the normal job of a backup. General manager John Dorsey believes his team is built to win now, and he is going to do everything he can to make sure that happens.

The biggest thing going for Foles with the Chiefs is the familiarity with head coach Andy Reid, who was the head coach of the Philadelphia Eagles for Foles' rookie season. Reid believes that Foles is a great fit for the team's offense in Kansas City, and he drew that conclusion based on how Foles fit with the Eagles under Reid. Foles even admitted that he signed with the Chiefs because of his past with Reid.

"Nick is familiar with our system and he's a good football player," said Reid after the signing of Foles. "He was good for me as a rookie and Chip [Kelly] his first year there. I think he's a good fit and you can't have enough of those guys. It's a tough position and you want to make sure you're fully loaded there--I think we're doing that."

In his second year as an NFL quarterback, Foles excelled under Chip Kelly with the Eagles. He threw 27 touchdowns and just two interceptions. 2013 was the season that gave rise to Foles.

2014 brought Foles back to "average," a season in which he threw for 13 touchdowns and 10 interceptions. Some believe he has the ability to get back to his 2013 form, but many contribute that season to having the right weapons around him and not many teams knowing how to defend Foles.

With the St. Louis Rams in 2015, however, Foles was a below-average quarterback. He completed just 54 percent of his passes, compared to 64 percent in 2013, and only threw seven touchdowns. He largely looked like a quarterback who was uncomfortable and didn't have faith in himself while with the Rams.

When asked about Foles' odd career progression, Reid noted that many factors affect a quarterback's play. "There are a million things that can go into that," Reid said. "He's healthy right now, I don't really care about anything else. He's the same guy he was. Every system is different and I know he fits this system."

Now it's Reid's responsibility to get Foles back to the quarterback he was while with Philadelphia. The Chiefs need to know that Foles can step in and keep the team on track in the event Smith gets hurt.

Here's a side note: it's unlikely that the signing of Foles will help the effort by the Chiefs to bring any ex-Rams fans on board with Kansas City. He was rather unpopular among St. Louis football fans.

Is Foles an above average backup quarterback? I'd say so and most would agree, but he's arguably a below average starter in the league. There are way too many question marks attached to him, which makes it hard at this point to count on him to lead the team if need be.

But, with the right weapons and leadership, he just might be able to prove some people wrong. For the Chiefs' sake, though, let's hope it doesn't get to that point.