Cologne - Promoted 1. FC Köln have sealed their fourth major signing of the summer, securing the services of 1. FC Kaiserslautern's 2013/14 top goalscorer Simon Zoller for the coming Bundesliga campaign.

The 22-year-old, who notched 13 goals in 28 league appearances for second-tier Kaiserslautern in the recently-ended campaign, put pen to paper on a four-year contract that will keep him at Rhineland side Köln until the end of the 2018/19 season.

The Bundesliga 2 champions had already bolstered their ranks by signing Albania defender Mergim Mavraj from Greuther Fürth, Kevin Vogt (FC Augsburg) and TSV 1860 Munich's Yuya Osako.