Canadian baseball star Larry Walker had an MRI exam on his sore neck and left shoulder on Thursday.

The St. Louis Cardinals outfielder has been bothered by a herniated disc this season. He received a cortisone injection earlier in the year.

"I might go and take another needle to relieve it," said Walker.

Cardinals outfielder Larry Walker had an MRI on his neck and left shoulder on Thursday. (CP File Photo)

"They say the second or the third one usually works better than the first. I've also heard nothing is the way to make it work. This is all speculative stuff."

Earlier this month, Walker suggested he could retire if age and injuries continue to take their toll. He also said he may consider prolonging his career as a designated hitter in the American League.

Walker, 38, is the most prolific big-league batter in Canadian history.

Named the National League's most valuable player in 1997, he has won seven Gold Glove Awards, five all-star selections, three Silver Slugger Awards and three batting titles over his storied career.

Walker is hitting .249 with seven home runs and 29 RBIs this season.

with files from Canadian Press