With free agency upon us here, the Cowboys haven't gotten off to the fast start like some of the other teams in the NFL.

In fact, that has never really been the Cowboys' style when it comes to the free-agent signing period.

However, they've been able to add some key players over the years, and a few have them occurred a few weeks later into free agency.

This week, let's focus on the 10 best free-agent signings in Cowboys history:

Honorable Mentions:

Brandon Carr

Keith Brooking

Anthony Henry

10. Darren McFadden – Considering the Cowboys just lost DeMarco Murray in free agency, McFadden was supposed to provide some relief. Instead, he not only outrushed Murray, but led the Cowboys with 1,089 yards, the fourth-most yards in the NFL in 2015.

9. Ken Hamlin – Signed with some injury concerns out of Seattle, Hamlin recorded five interceptions in 2007 and earned a Pro Bowl spot.

8. Kyle Kosier – One of the more underrated players in recent years, Kosier was a durable, dependable and versatile lineman during some of the Cowboys best teams in the late 2000s.

7. Rocket Ismail – Signed in 1999, Rocket was the speedster the Cowboys needed on the outside, providing many exciting moments.

6. Ray Donaldson – Brought in to replace the departed Mark Stepnoksi, Donaldson fit right into the Cowboys' plans, earning two Pro Bowls in his only two seasons with the team.

5. James Washington – One of the Plan B free agents in 1990, Washington not only came up huge in the Super Bowls, with four turnovers in two games, but he gave the Cowboys a big-hitter in the secondary.

4. Leonard Davis – While he might not have worked out in Arizona as a tackle, Davis was a great fit at guard, where the Cowboys decided to play him in 2007. Davis earned three Pro Bowls in his first three seasons.

3. Jay Novacek – A Plan B free agent in 1990, Novacek proved to be a security blanket for Troy Aikman, catching at least 40 passes in each of his six seasons in Dallas with a total of 28 touchdowns. He had just eight TDs in five previous years with the Cardinals.

2. Deion Sanders – One of the biggest free agent signings of his era, Sanders definitely enhanced the market for defensive players, especially cornerbacks. But he helped the Cowboys over the top in 1995, helping them win a Super Bowl title.

1. La'Roi Glover – While his supporting cast wasn't always up to par, Glover couldn't have done more for his team in his four years in Dallas. His versatility allowed him to play multiple positions in different schemes. He was a run-stopper and pass-rusher all rolled into one. Glover is the only player in franchise history to earn a Pro Bowl spot in his first four seasons with the team.