In one game between Pelé's Santos FC and São Paulo FC in the 1967 edition of the Campeonato Paulista, which ended in a 3–3 draw, Dias, kept Pelé scoreless while scoring 2 goals in the process.

The São Paulo teams he played for were never really contenders—the board opted to spend their money in the construction of Estádio do Morumbi instead of on players.

Pelé was past his prime—and the construction of Morumbi completed in 1970, São Paulo FC promptly won two Paulistas.

After many years training and working as coach for the São Paulo FC youth team, Roberto Dias suffered a fatal heart attack and died in São Paulo.

In his honor, the SPFC team played with a black armband in the second game against Boca Juniors for the 2007 Sudamerica Cup.