The EU LCS Spring Split was the split of the rookie. Seven of the twelve league's rookies made it to playoffs this year and their talent shined in the regular season.
Three of those rookies belong to Team Vitality:
if one of my players do not get rookie of the split i will rename to potatocannon permanently— YamatoCannon (@YamatoMebdi) March 27, 2018
Considering his rookies' performance in the quarterfinals, Yamato has a good chance of being in the clear. Vitality is the only team left in the playoffs with 2018 rookies. If Jiizuke, Jactroll, or Minitroupax perform amazingly this Saturday against Fnatic, Yamato might not have to worry about changing his name.