Cundiff has been having a stellar season after beating out former Pro Bowl kicker Shayne Graham during training camp due to his superior kickoffs and accuracy.
Signed last season as an emergency replacement for an errant Steve Hauschka, Cundiff hasn't relinquished his grip on the job ever since the Ravens tabbed him last season to salvage their kicking situation.
The former journeyman kicker spent the entire offseason with the Ravens after signing a one-year restricted tender, strengthening his leg and practicing his technique.
And his hard work is paying dividends.
After beating out one of the most accurate kickers in NFL history by outkicking Graham this summer, Cundiff has converted 10 of 12 field goals.
"I feel comfortable with our kicking situation this year," said Ravens coach John Harbaugh, who dealt with uncertainty and inexperience last year when Haushka flopped after beating out Graham Gano. "I like Billy. I think he's a heck of a kicker, and obviously that's been proven. He's made some big kicks for us, so he's done a great job. I think everybody can see that."
Cundiff connected on a game-winning field goal in the Ravens' 37-34 overtime victory over the Buffalo Bills. It was the sixth game-winner of his career.
Cundiff has also established a franchise single-season record with 18 touchbacks, breaking Matt Stover's mark and ranking second in the league behind Oakland Raiders kicker Sebastian Janikowski.
Graham has struggled to find work since being cut by the Ravens. He had an emergency stint with the New York Giants, making four extra points when Lawrence Tynes was hurt before being cut.
"I thought we had two really good kickers in training camp," Harbaugh said. "I'm sure that they'll both prove to be quality NFL kickers. And that's my answer."
When Cundiff knocked in a 38-yarder in overtime against the Bills, it marked his second game-winning kick since joining the Ravens.
He hit the game-winning field goal in overtime last season in a 20-17 win over the Pittsburgh Steelers.
"Yeah, I felt like I was in a good rhythm," said Cundiff following the decisive field goal against Buffalo, going 3 for 3 on the day. "So when I got out there, I just did exactly what I did on the previous two times."
Cundiff recorded four touchbacks against the Bills to surpass Stover's old mark of 15 touchbacks from 1997, the Ravens' second season.
"Billy has been a factor all year long with his kickoffs, even the kickoffs that are returned," special-teams coordinator Jerry Rosburg said. "Typically, they have enough hang time and distance on them where it gives our guys a chance to get off blocks. So, that's been a real positive."
Cundiff was out of football for nearly two years as far as not having a job, working diligently and going to tryouts unsure if he would ever get another shot to kick in the NFL.
"I think it's a tribute to Billy, first of all, that he would persevere," Rosburg said. "It's also a tribute to his wife and family that they would support him during this effort. I think if you look at the history of the specialists, there's probably more specialists that have done this than other players because a specialist can work by himself. It's difficult to get your brother-in-law to come out there and drive-block you."
Cundiff's booming kickoffs are a testament to his hard work in the Ravens' offseason program.
He's visibly bigger and stronger than he was a year ago.
"I think Billy has also been a beneficiary to being in a club during the offseason," Rosburg said. "We can all imagine being out there on our own, being a free agent, and trying to train and trying to do the nutrition and doing the practice facility. And all the things that you gain by being in a club during the offseason, Billy has really taken advantage of
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