30-year-old Feddal has signed a two-year deal with Sporting, who have the option to add an extra year.
The Lisbon club have paid a reported €3m for Feddal, a Moroccan international.
🛬 De 🇲🇦, mais uma peça “central” para a defensiva Leonina!
— Sporting Clube de Portugal (@Sporting_CP) August 18, 2020
Prior to the Coronavirus pandemic shutting down football, Feddal was in advanced talks to join Valencia.
However, he instead moves to Liga NOS with Sporting, where he will add experience and quality to the backline.
Feddal made 62 appearances in total for Betis, scoring five goals during his time at the Spanish club.
Sporting have also brought in dynamic central midfielder Pedro Goncalves from Famalicao today.
The promising 22-year-old has cost Sporting a fee of around €7m.