The former Spain international is set to play for Deportivo Santa Ana at the ripe age of 38.
The modest side are part of the capital city’s Primera Regional division, with the report coming only days after Brazilian phenomenon Ronaldo announced he was ready to come back to playing football.
Morientes’ career was brightest as Madrid club legend Raul’s strike partner, with the powerful forward making 182 La Liga appearances over seven years at the Santiago Bernabeu, scoring 72 goals.
The Spaniard, who was capped 47 times for his country and scored 27 goals, played a solitary season at Liverpool in 2005-06, but only managed to hit the net eight times in the Premier League before being sold to Valencia.
Morientes retired from the game back in 2010 after a season with Marseille in France, but looks set to play at the regional club, with his son in the outfit’s youth ranks.
Santa Ana president Rafael Gonzalez stated that he was delighted that the former professional would turn out for the side.
“He said he would help out if he felt good,” Marca claim Gonzalez as saying.
“He promised to give us an answer in January and he said yes. We want him to play in all of the home games, where he feels more comfortable.
“He is in good physical condition and he hasn't forgotten how to score goals."