Infiltration

Lee was fired from his team, Panda Global, in November 2018 after the organization learned of a domestic abuse case he was convicted for the year before.

On October 22, 2017, Lee was arrested in a domestic violence dispute with his then-wife where he bruised her wrist while grabbing for her phone during an argument where he had asked her for a divorce. A South Korean court ruled against Lee on November 30, 2017. Panda Global, Lee's sponsoring team, learned about the assault in September 2018 and withdrew Lee from all upcoming tournaments at the time. He was fired from the team on November 22, 2018 after Panda Global obtained his court records.

Lee is known for having a defensive playstyle as determined by Justin Wong's Step Up Your Game series. On January 16, 2015, Eventhubs ranked Lee at #6 on their Top 50 Ultra Street Fighter IV players list. Lee is also known for creating an outstanding comeback against Eduardo "PR Balrog" Perez in the Losers Semis at EVO 2013 Super Street Fighter IV: Arcade Edition v2012, where he counterpicked Perez's Balrog with Hakan. Lee qualified for the 2014 Capcom Cup by winning CEO 2014 in an exciting battle against Evil Geniuses' Yusuke Momochi. Momochi would later defeat Lee at Capcom Cup 2014 resulting in the latter to get a 4th-place finish.

A controversy regarding 2015's Capcom Pro Tour circuit came up regarding Lee, with some labeling him as a "gatekeeper" due to visiting multiple CPT events despite already qualifying for Capcom Cup (here 'gatekeeping' means to keep other players from qualifying). Lee stated in an interview that his intention was not to gatekeep, but instead to practice before the Capcom Cup begins in December. Lee also states that Street Fighter V is going in a good direction, as he thinks that making the game offense-oriented will make it faster and better.

On November 15, 2015 Infiltration signed with Team Razer.

Lee is the winner of the Street Fighter 25th Anniversary Grand Finals for both Super Street Fighter IV: Arcade Edition v2012 and Street Fighter X Tekken and won $25,000 for each game. The former event saw Lee win against Mad Catz's Daigo Umehara 6-0. Because he won the latter, Lee also received a one of a kind Street Fighter-based Scion FR-S Coupe. Lee also won the Capcom Cup 2013 Street Fighter X Tekken tournament in which he was invited to by Capcom. In March, Lee qualified for the Capcom Pro Tour Asia Finals by winning Nine States Tournament 2015. In late May, Lee qualified for Capcom Cup 2015 by placing Top 3 at Stunfest 2015. Lee's opponents in Top 3, Momochi and Umehara have already qualified thus giving Lee the qualifying spot by default.

Because of his performances in 2012, Lee has been called "Player of the Year" by many including Capcom. However, in late 2013, Lee saw a small decline where other players managed to catch up to his level. Overall, Lee still manages to perform well in tournaments he enters, usually making Top 4.

Lee Seon-woo (born 23 March 1985), known as Infiltration, is a professional electronic sports player from Seoul, South Korea, specializing in fighting games. Lee is a six-time Evolution Championship Series (EVO) champion; winning Super Street Fighter IV Arcade Edition v2012 in 2012, Street Fighter X Tekken in 2012 and 2013,, Street Fighter V in 2016 and 2018 (EVO Japan) and Samurai Shodown in 2019.

Lee was born on 23 March 1985 in Seoul. He has two brothers. In mid-2014, Lee had to sell the one-of-a-kind Scion FR-S Coupe he won because of high maintenance issues. This was also the same car Lee actually had to earn his drivers license for, just so he could drive it.