Jonny Hayes

Hayes was born in Dublin, County Dublin. He started his career at Reading, but with first team opportunities limited, he joined Forest Green Rovers on loan in February 2006, scoring on his debut in the FA Trophy against Dorchester Town. He spent a month on loan at Chesterfield in October 2006 without making an appearance, and in January 2007, was loaned to MK Dons until the end of the 2006–07 season.

On 6 June 2007, Hayes was released by Reading at the end of his contract. He joined Leicester City on a three-year deal on 4 July 2007, and made his league debut against Blackpool on 11 August.

On 7 January 2008, Hayes joined Northampton Town on loan until the end of the season. On 13 October, Hayes joined Cheltenham Town on a trial period, with a view to a loan move, a move which was confirmed on 20 October 2008.

On 20 July 2009, Hayes was released from his Leicester contract by mutual consent.

On 22 July 2009, Hayes joined Scottish First Division side Inverness Caledonian Thistle after a successful trial period. Inverness were promoted to the Scottish Premier League at the end of the 2009–10 season. Hayes was part of the team that guided Inverness to the Challenge Cup final against Dundee. Hayes was involved in setting up both goals for Adam Rooney and Nauris Bulvitis, however, the Highlanders lost out 3–2 to Dundee at McDiarmid Park in Perth

Hayes was linked with a move away from Inverness after impressing in his debut season with the club, as his contract was expiring. However, he went on to sign a new two-year deal. On 11 September 2010, he scored the opening goal in an SPL match against Rangers with a stunning long-range strike.

Aberdeen claimed a deal had been struck with Hayes on 30 May 2012. Almost a month later, Hayes finally put pen to paper, signing a two-year contract with the Dons. Hayes went on to make his competitive debut for Aberdeen, in an opening day 1–0 defeat away to SPL champions Celtic. The following weekend, Hayes made his home debut against newly promoted side Ross County in a game which finished 0–0. He scored his first goal in Aberdeen colours in a testimonial for Neil Simpson against Manchester United. The midfielder showed good perseverance, pinching the ball off of Paul Scholes in the penalty box, before beating David de Gea with a composed finish.

On 3 August 2013, Hayes opened the scoring in the first match of the new season against Kilmarnock. This goal gave Hayes the honour of scoring the first ever goal in the new Scottish Premiership. Hayes agreed a contract extension in November 2013 that would keep him at Aberdeen until the summer of 2016.

In a 4–0 win over St Johnstone in the League Cup semi-final at Tynecastle, Hayes scored twice to help send the Dons into their first major cup final for 14 years. A poor goal kick by Steve Banks allowed Adam Rooney to square the ball across the six-yard box for Hayes to knock into the net. Clever footwork by the winger late in the second half led to a fine finish just inside the 18-yard box to wrap up the match and send Aberdeen through to the final. Celtic goalkeeper Fraser Forster's run of clean sheets (13 games) was finally ended on 1,256 minutes on 25 February 2014 when Hayes beat him from 30 yards to open the scoring in a 2–1 win for The Dons. The goal was later voted as the SPFL Goal of the Season. On 16 March 2014, Hayes started for Aberdeen in the League Cup Final but early on he suffered a shoulder injury and had to be replaced by Cammy Smith.

On 29 December 2014, it was announced that Hayes had signed a contract extension, keeping him at Aberdeen until summer 2018.

In February 2016, Hayes had 18 stitches in his arm after being bitten by a dog.

Hayes received his first senior call-up in March 2016.

On 17 June 2017, Hayes signed a three-year deal with Scottish Premiership champions Celtic, for a fee in the region of £1 million. On 23 December 2017, Hayes scored his first competitive goal for Celtic against his former club Aberdeen, scoring the second goal in a 3–0 win. He spent the second half of the season out injured after a tackle during a game against Dundee on Boxing Day, three days after his first goal of the season. He scored his second goal for the club in the 2–0 win over Rangers at Ibrox on 1 September 2019. He was released by the club in May 2020.

Hayes rejoined Aberdeen on a free transfer from Celtic, his contract having expired, on 23 June 2020, after three years away from the club. He signed a two-year deal, taking a significantly smaller wage to re-sign.

In August 2020 he was one of eight Aberdeen players who received a suspended three-match ban from the Scottish FA after they breached coronavirus-related restrictions by visiting a bar earlier in the month.