The Premier League new boys completed a move for Leroy Lita on Wednesday and Routledge has followed suit for an undisclosed fee, reported to be around £1.5million, after completing his medical.
The 26-year-old former England Under-21 international has put pen to paper on a three-year contract and will compete with Scott Sinclair and Nathan Dyer for a wing spot at the Liberty Stadium.
Routledge told the club website: "I'm looking forward to the challenge.
"It's taken a couple of days to get everything agreed, but I'm excited about getting started."
The adidas Nitrocharge is the most talked about new cleat in years. It was released on May 15 and will take your pitch by storm.
The Juventus jersey for the 2013/14 was released earlier this week. Be the first to wear the colors of the Old Lady.
Bayern Munich are kings of Germany and hope to be crowned kings of Europe at Wembley later this month!
Ajax has released their away soccer jersey for the 2013/14 season. Get in the Gear.
adidas has added some color to the Predator line with this new colorway. Released on May 17. Be the first to own a pair.
Borussia Dortmund hears Wembley Calling and are headed to London for the Champions League final.
The new PUMA evoSPEED 1.2 FG. A great new soccer cleat with classic look and first time for PUMA to be on the cleat.
The Liverpool 2013/14 soccer jersey is available for pre-order. The Reds are eager to compete for silver next season.
The push for more color on their cleats, adidas has added the infrared colorway to the adiZero f50 Line.
Chelsea won the Europa League on Wednesday. The Blues defeated Benfica 2-1 on injury time goal from Ivanovic.