Pamela Rose Martinez (born June 15, 1989) is an American professional wrestler. She has been signed to WWE since December 2012^[update], where she performs on the Raw brand under the ring name Bayley. Her second reign of 380 days with the WWE SmackDown Women's Championship is tied with Rhea Ripley as the longest in the championship's history.

From 2008 to 2012, she wrestled on the independent circuit under the ring name Davina Rose. Martinez signed with WWE in 2012 and was assigned to the NXT brand, where she adopted the ring name Bayley. In 2015, she won the NXT Women's Championship. On the main roster, she has held the WWE (Raw) Women's Championship twice, the WWE SmackDown Women's Championship twice, and the WWE Women's Tag Team Championship twice with Sasha Banks, of which they were the inaugural holders, making her the first women's Triple Crown Champion and Grand Slam winner in WWE history. Her inaugural WWE Women's Tag Team Championship reign with Banks came by way of winning the Elimination Chamber match in 2019. Additionally, she won the 2019 Money in the Bank ladder match and the 2024 Royal Rumble, where she set a women's record for the latter of 1 hour and 3 minutes (this was broken by Roxanne Perez in 2025). This also made her one of only two women to win the Elimination Chamber, Money in the Bank, and Royal Rumble matches, after Asuka.

Pamela Rose Martinez was born in San Jose, California and grew up in a Mexican-American family. She attended Independence High School in San Jose and once played as a captain of the school's basketball team, as well as participating in track and martial arts.

Martinez had been attending shows by Big Time Wrestling, a professional wrestling promotion in Northern California, since the age of 11. In April 2008, she started her professional wrestling career at the age of 18, by attending Big Time Wrestling's training classes by her head trainer Jason Styles, which was one of the reasons why Martinez considered Big Time Wrestling as her home promotion. She had her first match in September 2008. On the American independent circuit, Martinez wrestled under the ring name Davina Rose. Rose wrestled for Big Time Wrestling from 2008 to 2012. Between 2011 and 2012, Rose branched out to wrestle for other promotions such as NWA Championship Wrestling from Hollywood, Pro Wrestling Destination and Shine Wrestling.

In October 2010, Rose first met her mentor Serena when they teamed together for a tag team match. In October 2011, Rose made her debut for Shimmer Women Athletes. At the tapings of Shimmer Volume 41–44, she became embroiled in Serena's feud with the Canadian Ninjas (Portia Perez and Nicole Matthews). At the tapings, Rose lost all four matches, including her debut match against Mercedes Martinez. In 2012, on Volumes 51 and 52, Rose picked up her first two singles victories over Cherry Bomb and Rhia O'Reilly.

In December 2012, Martinez signed with WWE. In January 2013, Martinez made her debut for WWE's developmental territory NXT at a live event, wrestling under a mask as Luchadora for one match, teaming with Paige and Charlotte to defeat Summer Rae, Audrey Marie and Emma in a six-woman tag team match. She adopted the ring name Bayley and made her NXT television debut on the March 20 episode in a loss to Paige. On June 12, Bayley adopted a new character of a doe-eyed fangirl, losing to Alicia Fox in the first round of the NXT Women's Championship tournament to crown the inaugural champion. On August 21, Bayley unsuccessfully challenged AJ Lee for the Divas Championship. On September 4, for her first win, Bayley and Charlotte defeated Alicia Fox and Aksana. To Charlotte's annoyance, The BFFs—Beautiful, Fierce Females (Sasha Banks and Summer Rae) attempted to convince Bayley to join them, but this led to Charlotte attacking Bayley during their match against the BFFs on November 13, promptly joining the BFFs instead.

On May 1, 2014, Bayley failed to advance in a tournament for the vacant NXT Women's Championship after losing to Banks in the first round. After pinning Charlotte in a tag team match, Bayley defeated Banks to become the number one contender to Charlotte's NXT Women's Championship, but she was unsuccessful in capturing the title at NXT TakeOver: Fatal 4-Way on September 11 and in a rematch on October 2. In mid-October, after losing to Banks, Bayley was attacked by her former friend Becky Lynch, who allied with Banks, and she formed an alliance with former rival Charlotte to feud with Banks and Lynch throughout the following weeks. On the November 27 episode, Bayley was attacked by Banks and Lynch, injuring her knee in the storyline. She returned on the January 21, 2015, episode, saving Charlotte from an attack by Banks and Lynch, before reluctantly attacking Charlotte herself, leading to a fatal four-way match for the NXT Women's Championship at NXT TakeOver: Rival on February 11, where Bayley failed to capture the title.

In March, Bayley began a feud with Emma after Emma criticized Bayley for her niceness, claiming it had prevented her from winning the NXT Women's Championship. On the April 1 episode, Bayley defeated Emma. On the April 29 episode, Bayley was defeated by Dana Brooke after a distraction by Emma. At NXT TakeOver: Unstoppable on May 20, Bayley and Charlotte defeated Emma and Brooke. On the May 27 episode, Bayley lost to Emma; she and Charlotte were attacked by her and Brooke after the match. After a short hiatus due to a broken hand injury, Bayley returned on the July 22 episode, defeating Emma and setting her sights on the NXT Women's Championship, thus ending their feud.