By JOHN HANSEN | Norwalk Knights Opening up its 13th season, the Norwalk Knights amateur baseball team will play vs. Whitehall at Norwalk at 3:30 p.m. Saturday, May 10. The Knights will begin the season with most of last year’s the pitching staff. Returning veterans are Thomas Vieth (Royall), Carter Clausius (Hillsboro), Jon Fendt (Sparta) Mike…