Chanathip Songkrasin was promoted to the BEC Tero Sasana F.C.,first team squad by new coach Andrew Ord who had also been his youth team coach. On May 6 he scored a last-minute goal against Thai Port F.C. in Thai Premier League, which gave BEC Tero Sasana F.C. a 2-0 win. In early 2013 Chanathip had an offer from J.League side Gamba Osaka. At the end of the season he won the TPL Young Player of the Year.
2013 season
In mid October Shimizu S-Pulse of the J.League offered him a trial at the end of the 2013 season.In late October it was reported directly from BEC Tero Sasana's General manager Robert Procureur that Bundesliga club Hamburg will give Chanathip a trial at the end of the 2014 Bundesliga season if he succeed he will be the second Thai player to play in the Bundesliga after Witthaya Hloagune.