Jackson Arley Martínez Valencia (locally ; born 3 October 1986) is a Colombian professional footballer who plays as a striker for Chinese club Guangzhou Evergrande Taobao and the Colombian national team.
He is often nicknamed "Cha Cha Cha" for his dance-like moves on the pitch. Noted columnist Tim Vickery describes him as "an out-and-out goalscorer, a front-to-goal centre-forward who can finish off both feet." He was Primeira Liga's top scorer in all three of his seasons with Porto.
Martínez has represented Colombia at international level since 2009, playing at the 2011 and 2015 Copa América, as well as the 2014 FIFA World Cup. He is the first Colombian to score more than once in a FIFA World Cup match after scoring a brace against Japan in the 2014 FIFA World Cup.