Gold Earned Vs Spent

After a match, I was looking at the stats ans find out that one of the player on stats/graph has 3350 more gold spent than earned. I would like to know how it's possible...

http://matchhistory.na.leagueoflegends.com/en/#match-details/NA1/2373128523/78552981?tab=stats

Look at Master Yi stats - Gold Earned vs Gold Spent