Pittsburgh Pirates: Previewing Potential Rotation Battle

St. Louis Cardinals v Pittsburgh Pirates
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The Pittsburgh Pirates could have a rotation battle on their hands during Spring Training

The Pittsburgh Pirates are entering 2023 with three starters who are essentially guaranteed a rotation spot. Those three include young right-handers Mitch Keller, Roansy Contreras, and middle-aged southpaw Rich Hill. It's a stark contrast in age between Keller and Contreras to Hill, but it's a solid trio nonetheless. However, the last few spots of the rotation are still undetermined.

Among all the Pirates' final rotation options are Johan Oviedo, JT Brubaker, and Vince Velasquez. Who has the best odds of landing the last two rotation spots between this trio? What strengths and weaknesses do each bring to the table, and what would be the best starting five the Pirates could put out on Opening Day?