Declan Frith signed for Posh in the summer of 2025 from Swiss side Thun for an undisclosed fee. The 23-year-old enjoyed a successful spell for the Swiss club as they secured promotion to the top division in the country. Prior to that, he spent time at Valencia B in Spain after coming through the Academies at Aston Villa and Chelsea. Adept at playing on either flank, he is quick, direct and contributes to the side defensively.