The 2007–08 season was Ameobi's first campaign in the Leeds United first team. He previously played for the club's reserve side, which finished sixth in Division One Central of the Central League in 2006–07. Ameobi signed his first professional contract with Leeds United on 8 August 2007. He had been offered the contract on 8 May, but had to wait three months to sign the deal as the club had been placed under a transfer embargo. He made his first appearance of the pre-season in Leeds United's 2–0 defeat against Northern Premier League side Guiseley on 6 August. He started the match, which was the club's final pre-season fixture, and was replaced after 75 minutes. Ameobi made his debut for Leeds on 28 August, against Portsmouth in the Football League Cup. He was loaned out to the Championship side Scunthorpe United in November 2007.
Doncaster Rovers
Ameobi returned to Leeds before joining Doncaster on 22 July. On 24 September 2008, he was loaned to Football League Two side Grimsby Town. He later returned to Doncaster after just two appearances. Ameobi signed for Conference National outfitMansfield Townon loan in January 2009. He returned to Doncaster the following month, having played five games for Mansfield, but was released from his contract on 7 May.
In September 2009, Ameobi signed for Forest Green Rovers. He scored his first goal for the club in a 3–2 away win over Hayes & Yeading in January 2010 and also in that month represented Forest Green in the 3rd round of the FA Cup against Notts County. At the end of the season he was released by the club having made 28 league appearances and having scored 5 times.
In July 2010, it was announced that Ameobi was on trial with Whitley Bay. He subsequently signed a contract for the club having impressed in their pre-season friendlies. On 4 September 2010, he featured in the 2–2 draw away at Billingham Synthonia coming on as a half-time substitute. Later in the season Ameobi returned to the side, making appearances during Bay's title challenge against Jarrow Roofing and Newcastle Benfield.
BÍ/Bolungarvík
On 14 May 2011, Ameobi played his first game in an Icelandic league, and there in the second division. Ameobi's opponents were ÍR, but BÍ/Bvk. lost the game on Torfnesvöllur, 1–2. He scored BÍ/Bvk.'s goal in the game. Ameobi scored again in the second match of the season, winning Haukar away at Ásvellir, 2–1.
On 12 April 2013, Ameobi signed a 1+1 year contract with Finnish League team Vaasan Palloseura.
Return to Whitley Bay
After his contract with Finnish team Vaasan Palloseura expired, he returned to Whitley Bay. Ameobi played his debut, after his return to Whitley Bay, on 28 December 2013 against Guisborough Town.
FC Edmonton
Ameobi signed with NASL club FC Edmonton on 31 March 2014. He scored on his debut in a 1–1 draw with the Tampa Bay Rowdies. Ameobi would spend four seasons in Edmonton. After the 2017 season, with the future of FC Edmonton and the NASL in doubt, Ameobi was released from FC Edmonton. Ameobi would leave Edmonton as the club's second all-time leading scorer.
