After the round of matches, Osotspa defeated Police and the club returned to the top league.

In 1999 they reached the final of the Thai FA Cup collect, but were beaten 2–1 by Bangkok Bank at Supachalasai Stadium.

[5] In the 2002–03 AFC Champions League season, Osotspa achieved a 7–4 aggregate victory over the Churchill Brothers to qualify for the competition proper.

They successfully defended their Queen's Cup title on both occasions, to make it three consecutive victories in the competition.

In 2013, after Pairoj's contract ended, the club replaced him with former Pattaya United coach Chalermwoot Sa-Ngapol.

In the 2015 season, Osotspa relocated from Saraburi province back to Bangkok and used Rajamangala Stadium as their home venue.

in Thai Regional League Division 2 attempted to buy the majority share of the club.

[11] In the end of season 2017, the club announced its intent to relocate to Maha Sarakham province and merge with Jumpasri United F.C., the club that played at that time in Thailand Amateur League[12] and moved ground to Mahasarakham Province Stadium after receiving permission to do so from Football Association of Thailand.

After relocating to Maha Sarakham Province, for this reason, the legend Osotspa Football Club or Super Power Samut Prakan one of the longest established football club in Thailand since 1977 has officially ended at the end of season 2017.