Welge entered 2013 ranked world number 74, outside of the top 64 who retain their places on the PDC tour. Therefore, he played in the Q School in an attempt to win a tour card for 2013 and 2014 and succeeded on the third day, defeating 2008 World Championship finalist Kirk Shepherd 6–3 in his final match. He played in his second World Cup of Darts in February with Jyhan Artut and they qualified from Group F with 5–3 wins over Finland and the United States. The home nation then saw off Poland 5–2 and then played the Finnish duo of Jani Haavisto and Jarkko Komula in the quarter-finals. Artut beat Haavisto, but Welge lost to Komula 4–2 meaning that a doubles match was required to settle the tie. Germany came from 3–1 down to level at 3–3 but lost the deciding leg to exit the tournament.