[15] It wasn't until on 28 December 2004 when he made his first appearance of the season, coming on as a substitute in the 66th minute, in a 0–0 draw against Cardiff City.

In the 2006–07 Premiership season, McNamee helped the side beat Accrington Stanley in the third round of the League Cup in a penalty-shootout after a tie 0–0 in the regular time and kept after extra-time.

[24] It wasn't until on 28 November 2006 when McNamee made his Premier League debut, making a start before being substituted in the 72nd minute, in a 1–0 loss against Sheffield United.

[25] He made seven appearances for Watford in the middle of, and also scored the only goal in their fourth round FA Cup victory at West Ham United.

[26] Watford would go on to reach the semi-finals of the competition, but McNamee played no further part, as the club was relegated back to the Championship.

[30] He made his Crewe Alexandra debut on 24 March 2007, starting the match before coming off in the 82nd minute, in a 1–0 loss against Rotherham United.

[32] McNamee made his debut for Swindon Town, starting the match before being substituted in the 62nd minute, in a 0–0 draw with Crewe Alexandra on 26 January 2008.

[35] Ahead of the 2008–09 season, during a pre-season friendly with Portsmouth, he impressed Harry Redknapp, who praised him, saying "If he can produce that every week he won't be here long but can he do it regular?".

[44] Manager Wilson explained his decision to drop McNamme on the substitute bench, citing low confidence.

[35] At the start of the 2009–10 season, McNamee found himself competing with new signing Tope Obadeyi over the left–wing position, which resulted in him in the substitute bench in number of matches.

[35][48] His form continued into the start of the season, as rumours circulated that scouts across the country had their eyes on three Swindon Town players, Peter Brezovan, Simon Cox and Anthony McNamee.

[50] Amid the transfer speculation, McNamee scored his first goal in seventeen months, in a 4–3 win over Exeter City in the Football League Trophy campaign on 6 October 2009.

[52] On 26 November 2009, local newspaper Swindon Advertiser reported that McNamee was absent from training amid a loan move to Norwich City.

[54] McNamee made his Norwich City debut on 5 December 2010, coming on as a late substitute, in a 2–0 win over Oldham Athletic.

[56] McNamee's first game after signing for the club on a permanent basis came on 26 January 2010, coming on as a substitute during the second–half, as Norwich City won 2–1 against Walsall.

[59] McNamee scored his debut goal for Norwich City to take the lead in a 2–1 home win against Stockport County on 5 April 2010.

Following Norwich City's promotion to Premier League in 2011, McNamee found himself out of favour with manager Paul Lambert and was expected to leave the club.

[67] On 31 August 2011, McNamee left Norwich on a free transfer, signing a one-year contract at League One club Milton Keynes Dons with the option of a further year.

[69] However, he found his first team opportunities limited and was loaned out; then leading to an announcement on 31 January 2012 that McNamee left Milton Keynes Dons by mutual consent.

[75] After being released by Milton Keynes Dons, McNamee re–joined Wycombe Wanderers on a free transfer for the rest of the season.

[76] McNamee's first game after signing for the club on a permanent basis came on 4 February 2012, coming on as a substitute in the 68th minute, in a 2–1 win over Tranmere Rovers.

[77] Having spent the rest of the 2011–12 season on the substitute bench,[78] McNamee made fifteen appearances and scoring two times in all competitions.

[86] McNamee made his Woking debut, coming on as a substitute in the 72nd minute, in a 0–0 draw against Lincoln City in the opening game of the season.

In July 2021, McNamee was appointed manager of Combined Counties League Division One side Enfield Borough, with former Queens Park Rangers defender Patrick Kanyuka named his assistant.