Playoff series finale ... or an apt title for this puzzle considering the number and length of its theme entries

Question:

Length:

Similar Crossword Questions:

Nickname for the three-letter abbreviation hidden in this puzzle's theme entries
World Series of Poker game (and the theme of this puzzle)
Job title (giving a hint to this puzzle's theme)
What this puzzle's theme entries take, vowel-wise
"Lid" in each of this puzzle's theme entries
It can follow the last word of this puzzle's theme entries
Movie title that describes what happened to the five long entries in this puzzle?
Welcome mat spot (our puzzle title hints at the theme revealed by the pattern of circled squares)
Office building problem that's a hint to this puzzle's theme entries (see their last three letters)
There's one at the beginning of each of this puzzle's four theme entries
What each of this puzzle's theme entries contains
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Many people get one in the summer (and so do this puzzle's theme entries)
They're hidden in this puzzle's theme entries
What this puzzle's theme entries have
What the names in this puzzle's theme entries begin with
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1990s TV series title that was also a phone number
Word hidden in this puzzle's theme entries
Challenged, or what the theme entries in this puzzle should be
Process by which an element's atomic number may be reduced, and a hint to this puzzle's theme
Second of a pair of letters swapped six times in this puzzle's theme entries
Find new work - or what you must do to get the three theme entries' names in this puzzle
What this puzzle's theme entries probably do?