Born in
Camagüey, Mayor began taking part in sports at an early age and competed in the
pentathlon for her region in 2000. She started establishing herself at national level in the high jump in 2006 when she came third at the national championships and won at the
Barrientos Memorial meeting. She cleared 1.80 m for the first time the following year and made her first appearance abroad, placing fourth at the
2007 ALBA Games in
Caracas, Venezuela. She won at the Barrientos meet and went on to achieve a personal best jump of 1.85 m at the
2007 Pan American Junior Athletics Championship to win the
gold medal ahead of American Patience Coleman. The
2008 World Junior Championships in Athletics saw her win her first global level medal as she jumped a new best of 1.86 m in
Bydgoszcz to take the
bronze medal. Mayor improved her best to 1.89 m in February in
Havana and kept her good form at the
2009 ALBA Games, where she won the high jump gold medal. The
2009 Central American and Caribbean Championships in Athletics in Havana saw her make her senior debut at a top level event and she finished with the
bronze medal while St. Lucia's
Levern Spencer won the title. She was chosen to represent Cuba at the
2011 Pan American Games in
Guadalajara. There she had a three-way tie with
Marielys Rojas and defending champion
Romary Rifka as all the athletes cleared 1.89 m. This resulted in a jump-off duel for the medals and Mayor came out on top. ==Personal bests==