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Cubs reliever Mark Leiter Jr.'s family makes history as he starts season strong in pivotal role

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Cubs reliever Mark Leiter Jr. got to congratulate his cousin Jack Leiter a couple days before he debuted. And on Thursday, as Jack took the mound for the Rangers, the Leiter family made history.

The elder Mark Leiter and his brother Al became the first pair of MLB siblings to each have sons play in the major leagues.

“I know that they’re both extremely proud,” Mark Leiter Jr. said in a conversation with the Sun-Times Thursday before the Cubs’ game against the Marlins was rained out. “I know our whole family was proud of what they accomplished in their own right.