Since joining Sporting, Ronny struggled to gain first-choice status: in the 2006–07 season, he battled with internationals Marco Caneira and Rodrigo Tello to finish with 12 Primeira Liga appearances, although he would score a memorable goal in an 88th minute 1–0 away win against Associação Naval 1º de Maio on 26 November 2006 – his free kick was unofficially measured according to some sources and YouTube at 211 km/h (131 mph).

[1][2] Ronny began the 2007–08 campaign as starter, but with the arrival in January of Leandro Grimi from A.C. Milan lost his position, playing just six games in his third year.

[3] At the end of the loan, after helping Leiria stay up whilst contributing with three goals, Ronny transferred to German second tier club Hertha BSC, where his older brother Raffael was also playing.

[8] On 31 August 2016, Ronny and director of football Michael Preetz mutually agreed to terminate the former's contract one year in advance, after he became surplus to requirements under head coach Pál Dárdai.

[9] On 17 March 2017, more than one decade after leaving for Europe, 30-year-old Ronny returned to his homeland and signed with local Fortaleza Esporte Clube, choosing to wear jersey number 52 as an homage to his father Caetano, who had that age at the time and was also a footballer.