The 66-year-old Argentine, who took control following the sacking of Jesualdo Ferreira in November after a bad start to the season, initially rallied the Greens but results have since been poor.
A statement on the club website said Rocha's replacement would be announced on Tuesday.
Local media reports said former coach Jacek Gmoch, 73, was a leading candidate to take charge for a third spell at the club.
- Sports & Recreation
- Jesualdo Ferreira