Marina Alcalde Rodriguez (born April 29, 1987) is a Brazilian former mixed martial artist. She competed in the women's Strawweight division of the Ultimate Fighting Championship (UFC), achieving a 7–6–2 record with the promotion.

Rodriguez was born in Bagé, Brazil. She has two brothers, Gabriel and Roberto, the latter a two-time Parapan American Games gold medalist in swimming. In her youth, Rodriguez played football, volleyball, basketball, and handball. Growing tired of the lack of physical exercise in her job as a graphic designer, she started looking for a way to lose some gained weight. She then found her current coach, Marcio Malko. Eventually, she joined a muay Thai class in 2013 and soon thereafter started taking amateur bouts.

Rodriguez started her professional MMA career in 2015 and fought primarily in Brazil and amassed a record of 9–0 before competing in Dana White's Contender Series Brazil.

Rodriguez appeared in Dana White's Contender Series (DWCS) Dana White's Contender Series Brazil 2 web-series program on August 11, 2018, facing Maria de Oliveira Neta. She won the fight via technical knockout in the first round.

Rodriguez made her UFC debut on September 22, 2018, against Randa Markos at UFC Fight Night: Santos vs. Anders. The back and forth contest was ultimately ruled a majority draw.

Rodriguez next faced Jessica Aguilar on March 30, 2019, at UFC on ESPN: Barboza vs. Gaethje against. She won the fight via unanimous decision.

Rodriguez faced Tecia Torres on August 10, 2019, at UFC Fight Night 156. She won the fight via unanimous decision.

Rodriguez faced Cynthia Calvillo, replacing an injured Cláudia Gadelha, on December 7, 2019, at UFC on ESPN 7. At the weigh-ins, Calvillo weighed in at 120.5 pounds, 4.5 pounds over the strawweight non-title fight limit. The bout was held at a catchweight and Calvillo was fined 30% her purse, which went to Rodriguez. After three rounds of fighting, the bout ended with a majority draw.