Complex sentence: With the' 61 Twins struggling, Mele filled in as manager while Lavagetto took a seven-game leave of absence in early June, then formally succeeded to the job later in the month.
Split into simpler sentences: With the' 61 Twins struggling, Mele filled in as manager while Lavagetto took a seven-game leave of absence in early June. He then formally succeeded to the job later in the month.