The two sides clash in O'Connor Park on Saturday.
Tullamore and Shamrocks clash will be a very close contest.
That's according to Midlands 103 commentator Brian Gavin, as the two sides are set to clash in group two of the Offaly Senior Football Championship on Saturday.
The reigning champions defeated Bracknagh in their opening fixture, while Shamrocks were too strong for the challenge of Clonbullogue.
Gavin says while both teams will want to win, a defeat won't define their seasons:
Throw in is at 4:30pm in O'Connor Park on Saturday.
You can hear the Brian Gavin's full interview with Liam White here:
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