The Galaxy announced the latest addition Tuesday. They are using Targeted Allocation Money to sign the Serbian veteran.
The 28-year-old Katai spent the last two seasons in Chicago, scoring 18 goals in 62 appearances.
The Galaxy are expecting him to provide an offensive boost for a depleted lineup. The club lost top goal-scorers Zlatan Ibrahimovic and Uriel Antuna, and top playmaker Romain Alessandrini hasn’t re-signed.
Katai previously has played for Red Star Belgrade and for Alavés in La Liga.