How many times have SKT lost BO3 or BO5 after their first championship?

For Bo5 it's Definitely single digit, I think in LCK they've lost three times since their first championship. And internationally they've only lost one best of five to EDG. FOR Bo3....I don't really think it matters.

Counting domestic competition into the metric and only using SKT T1 K prior to the merge in 2015, The team has suffered 28 match losses in either Bo3 or Bo5 format (30 if you count 2 Bo2 losses). Among the 28, their total losses in Bo5 is 3; one being against international competition. The following is the list of losses - The ones in bold are Bo5 losses

Pre 2015

• Samsung Blue - WCG Semifinals 2013
• KT Arrows - OGN Champions Spring 2014 (Bo2 - Not included but noted)
• Samsung Blue - OGN Champions Summer 2014 (Bo2 - Not included but noted)
• Samsung White - OGN Champions Summer Playoffs
• Najin White Shield - Korea Regional Qualifier

LCK Spring 2015

• CJ Entus - Week 1
• Jin Air Green Wings - Week 3
• GE Tigers - Week 6

Post Spring 2015

• EDward Gaming - Mid Season Invitational 2015

Summer 2015

• CJ Entus - Week 10

Post Season 2015

• Ever - KeSPA Cup Semifinals 2015

LCK Spring 2016

• Jin Air Green Wings - Week 1
• ROX Tigers - Weeks 3 and 10
• Longzhu Gaming - Week 6
• Afreeca Freecs - Week 6
• KT Rolster - Week 13

LCK Summer 2016

• Jin Air Green Wings - Week 4
• Afreeca Freecs - Weeks 5 and 9
• Ever - Week 6
• Longzhu Gaming - Week 11

Post Season 2016

• ROX Tigers - KeSPA Cup Semifinals 2016

LCK Spring 2017

• Afreeca Freecs - Week 4
• Samsung Galaxy - Week 7

LCK Summer 2017

• Samsung Galaxy - Weeks 1 and 6
• Afreeca Freecs - Week 6
• Jin Air Green Wings - Week 7
• Longzhu Gaming - Week 7