Marcelo "Marcelinho" Magalhães Machado (born 12 April 1975) is a former Brazilian professional basketball player.

He spent most of his career playing with Flamengo in Brazil's top-tier level NBB league, and he was also a long-time member of the senior men's Brazilian national basketball team.

He emerged as one of the greatest hopes of Brazilian basketball as a career then idol Oscar Schmidt was ending, mainly due to the similarities of their game, a player who threw a lot of balls three and did many points.

He went through teams like Botafogo, Tijuca, Ginástico (MG), Corinthians (PR), Crabs Rimini (ITA), Alerta Lobos Cantabria (ESP), Telemar/Rio de Janeiro, with whom Marcelinho won the Campeonato Brasileiro de Basquete, after a final series against Unitri/Uberlândia, which would be his next team, in 2005.

After he played for Uberlândia, Machado went to Lithuania to defend the main team of the country, Žalgiris Kaunas.

He stayed in Lithuania until 2007, helping Žalgiris win the national championship and cup, before he signed with Flamengo.

The arrival of Marcelinho to Flamengo created much expectation around the team, who had never won the Campeonato Brasileiro de Basquete, not even on the Oscar Schmidt Era.

Marcelinho played a great match, with 36 points in a 90–89 win, dueling with the Pinheiros' forward Marquinhos, his teammate in the Brazilian national team.

Keeping the previous season champion team's base, Flamengo acquired an important teammate to Marcelinho: the former NBA center Rafael "Baby" Araújo.

In the middle of the season, Marcelinho was chosen for the NBB All Star Game as the most voted player.

Flamengo had signed the forward-center Guilherme Teichmann, from Limeira, to replace Rafael Araújo, who had gone to Paulistano.

In the semifinal series of the playoffs, Marcelinho was responsible for classification of Flamengo to the Finals, with a threes-pointer missing 5 seconds to the end of the Game 4.

It started when Penna passed the ball between the forward David Teague's legs to escape his marking.

Two days later, Marcelinho was close to score his first triple-double in NBB, against Brasília, with 25 points, 9 rebounds and 8 assists, in the 110–72 win.

In the playoffs, Machado, beside his teammates Caio Torres, Federico Kammerichs and David Jackson eliminated Uberlândia after five games, reaching the semifinals for the fourth time.

For the 2012–2013 NBB season (NBB 5), Flamengo mounted a super-team, hiring players like Marquinhos and Olivinha, from Pinheiros, Vítor Benite, from Limeira, Kojo Mensah and Shilton, from Joinville, and Gegê Chaia, from Tijuca, besides keeping players like Caio Torres and Duda Machado.

But soon in the first game, against Vila Velha, Marcelinho ruptured the ACL in the begin of the second quarter, which kept him out of the courts throughout the rest of the season.

In January, 2013, Flamengo hired the Paraguayan Bruno Zanotti to replace Marcelinho, who saw his team win the NBB at the end of the season.

Marcelinho's younger brother, Duda Machado, also represented Brazil's senior national team.