GLENDALE, Ariz. — Dylan Cease and Michael Kopech probably won’t be around when the White Sox open their proposed South Loop ballpark years from now. Cease has been the subject of trade rumors all offseason and might not even make it to opening day on the Sox roster. Kopech will be a free agent after 2025, and even if he makes it that far, the Sox aren’t known for handing out long-term extensions for their starting pitchers, as Carlos Rodon and Lucas Giolito learned. But Cease and Kopech began their major-league careers on the South Side at Sox Park and have developed an affinity for the ballpa…