GUESSING GAME: He's a Welsh footballer, do you know who he is?

Here is an introduction to a player. Do you know who he is?

1. He's a Welsh professional footballer

2. He began his professional career at Southampton, playing at left-back

3. In 2013, his transfer was reported to break the world transfer fee of C.Ronaldo 

Last game was: 

1. He inherited the captaincy at season 2017–18

2. He is the highest scoring midfielder for his national football team post-World War II.

3. He only plays for one team so far in his professional life.

The answer is De Rossi. @akash564 @Innocent_7 @Dhairya_Rawal are the first three registered users to get the exactly right answer! Congrats!