He missed the last three games to injury but said Vieira is challenging him to be more mature with his training habits .
After starting this season with two goals and four assists , Shelton has been off the scoresheet since May .
Shelton missed the last three games to injury but said Vieira is challenging Shelton to be more mature with Shelton 's training habits .
After starting this season with two goals and four assists , Shelton has been off the scoresheet since May .