Johan pieliedie Ostrem is an experienced Swedish professional player, a former participant of WarCraft 3 and Dota tournaments, who has earned around $1,000,000 in eSports.

Johan started his professional career in 2012, founding the Kaipi team together with FATA- and paS, and finishing second at GosuLeague Season 4 in November. In 2013, the team started changing roster, tags and organizations, first moving to RaTtLeSnAkE and then to Speed Gaming and Cloud9. An important achievement was a first place finish at the MLG Championship Columbus. In Cloud9 the team reached 5-6 places at The International 2014 and second places at World Cyber Arena 2014 and The Summit 2, but soon new captain EternaLEnVy expelled Johan.

He played in MeePwn'd and Team Tinker for the rest of the season before joining mousesports. Failure to qualify for The International 2015 led to the team breaking up, and in August 2015 pieliedie moved to Team Secret, where he achieved the greatest success of his career, winning MLG World Finals, Nanyang Dota 2 Championships - Cruise Cup #1 and finishing second at The Shanghai Major 2016, losing only to OG in The Frankfurt Major 2015 final.

In mid-2017 he teamed up again with EternaLEnVy in Team NP and spent the next two years with Fnatic, Mineski, Forward Gaming and Newbee, reaching second place at DreamLeague Season 9 with Fnatic and finishing 9th-12th at The International 2019 with Newbee.

Since the summer of 2020, he has played for 5men alongside Ace and Chessie, winning silver at OMEGA League: Europe Divine Division and ninth place at OMEGA League: Europe Immortal Division, but left the team after four months. After six months with Team Bald Reborn, he was invited to join Team SMG. He finished 9th at BTS Pro Series Season 10: Southeast Asia, where the team failed to advance out of the group stage, and Team SMG finished 6th at DPC SEA 2021/2022 Tour 3: Division I. After that, Yonagh announced that he would be joining Team SMG . After this, Yonagh announced that he was ending his career as a player.

In January 2024, pieliedie became the coach of Talon Esports. With him, the squad participated in qualifiers for BetBoom Dacha Dubai 2024, ESL One Birmingham 2024 and DreamLeague Season 22. Among all the qualifiers, the most successful result the team showed at the LAN qualification in Birmingham, where Talon Esports was able to take the 1st place and get a slot to the tournament. At the event itself, the team took 9th place. Later, the team took 3rd place at RES Regional Series SEA #3 and qualified for The International 2024.

After failing at the biggest tournament of the year, Talon went to BetBoom Dacha Belgrade 2024 and eliminated as one of the first teams to go. At DreamLeague Season 24, the team suffered the same fate: they couldn't even get out of the group stage.

• November 18, 2024 - pieliedie left Talon Esports.