MIAMI (CBSMiami) – One of the key pitchers the Miami Marlins hoped would be in a strong and young rotation will instead start the season out in Triple-A ball.

Jacob Turner, who was 1-4 with a 3.38 ERA at the end of last year for the Marlins, was sent down to Triple-A ball Tuesday morning as the Marlins continued to trim the main roster in preparation for the regular season, according to Clark Spencer of CBS4 news partner the Miami Herald.

Turner was acquired in the trade last year for Anibal Sanchez. He was at one time one of the top prospects in the Detroit Tigers organization, but started to fall out of favor. In spring training this year, Turner has struggled with control which helped cement his spot in Triple-A.

Turner had a 9.69 ERA in spring training and allowed three home runs in 13 innings of work.

In addition, Spencer reported that left-handed pitcher Dan Jennings was also sent to New Orleans.

The Marlins are expected to have a starting rotation made up of Ricky Nolasco, Henderson Alvarez, Wade LeBlanc, Nathan Eovaldi and another pitcher to replace Turner while he gets more seasoning in Triple-A ball.