1. Tá a fhios ag an bainisteoir nach mbeidh a fhoireann ábalta súil go héascaí chuig an chluiché ceannais.

'the manager knows that his team won't be able...??..to the final'

2.…ach tá a mhalairt de smaointí ag banisteoir Rossa agus a chuid iománaithe.

'..but the Rossa manager and his hurlers have to change..??'

quote:

1. Tá a fhios ag an bainisteoir nach mbeidh a fhoireann ábalta súil go héascaí chuig an chluiché ceannais.

Trí bhotún:

ag an mbainisteoir / ag an bhainisteoir
siúl (ní hé "súil")
éasca

The manager knows that his team won't be able to walk to the final easily.

quote:

2.…ach tá a mhalairt de smaointí ag banisteoir Rossa agus a chuid iománaithe

Something along the lines of:

but Manager Rossa and his hurlers had a change of mind.

Anataine, it would be easier if you gave us the whole sentence rather than fragments. If you are getting these online somewhere, a link would be good.
1. is as FnaB says.

My guess at two is that there was some idea being presented before that, and that the fragment means "the manager of Rosses and his hurlers have different thoughts on the matter"