ESPN Dolphins reporter James Walker discusses Miami's decision to bring in Mario Williams and what it signals about the team's offseason plans. (2:58)

New Miami Dolphins defensive end Mario Williams sounded like a rejuvenated player during his conference call on Wednesday. Williams signed a two-year, $17 million contract to add to Miami's defensive line that already includes Ndamukong Suh and Cameron Wake.

Williams, a former four-time Pro Bowler, is coming off his worst season with the Buffalo Bills, registering just five sacks. However, a new 4-3 scheme -- Williams played in Buffalo's 3-4 last season -- and a change of scenery has Williams thinking big in 2016.

Mario Williams has 96 career sacks but only had five last season with the Bills. Tom Szczerbowski/Getty Images

"I can't wait," Williams said. "It's almost like one of those things where it's the first time you've done something. The first time you came to college. The first time you played NFL football. It's the same great feeling. I don't even look at age or whatever. I still think I'm young and I feel that way."

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Williams had interest from several teams and met with the Dolphins and New York Giants. He said he was impressed with the energy throughout the building for the Dolphins. He met with coaches and spoke to players such as quarterback Ryan Tannehill, center Mike Pouncey and defensive tackles Suh and Earl Mitchell.

But the person who stood out most to Williams was Dolphins owner Stephen Ross.

"It was like talking to somebody 30 years old -- he was just full of energy," Williams explained. "And I want to say he's 75? You're talking to someone with so much enthusiasm and energy and passion towards the team, and then it trickles straight down to the last guy. The outlook is definitely [positive]."

Williams posted double-digit sacks three years in a row (2012-2014) with the Bills playing in a 4-3 defense. Then, Buffalo head coach Rex Ryan took over and used more of a 3-4 scheme and his production tailed off. Williams admitted, 'last year had a lot of setbacks."

According to Williams, the scheme doesn't matter as much as his role in the defense. He met with Dolphins defensive coordinator Vance Joseph and felt comfortable he would have opportunities to get to the quarterback, which is what Williams does best. He had 96 career sacks in 10 seasons.

"It's about utilization," Williams said. "I know [Joseph's] mindset as our coordinator. It's going to be guys on the hunt."