Siddhesh Lad had played his one and only match for MI in IPL 2019.
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Lad was bought by MI franchise in 2015 but finally got to play his first game in 2019 against Kings XI Punjab. His journey and wait for an IPL debut was also covered by Netflix in their documentary Cricket Fever: Mumbai Indians. In his debut, he hit a six off the first ball he faced and scored 15 runs from 13 balls in his debut game.
Here is the announcement from Mumbai Indians: