Complex sentence: To gain first-team experience, Saleiro was sent by Sporting on loan to C.D. Olivais e Moscavide, where he made his professional debuts; however, he got injured and didn't play much during his first season, where he partnered Miguel Veloso.
Split into simpler sentences: To gain first-team experience, Saleiro was sent by Sporting on loan to C.D. Olivais e Moscavide, where he made his professional debuts. However, he got injured and didn't play much during his debut season, where he partnered Miguel Veloso.