Career
Walsall
Born in Birmingham, West Midlands, Smith progressed through the youth system at Walsall, eventually signing a one-year contract in May 2006, which kicked off his professional career. He was captain of Walsall reserve team during the 2006-2007 season. He was on the verge of the first team during this very season, however the management at Walsall believed that he lacked that competitive match experience which was needed to become a first-team regular.
He was allowed to link up with Southern Football League Premier Division side, Halesowen Town on loan.
During his short time at the club Smith made five league appearances for the Birmingham-based outfit before returning to Bescot Stadium, to make his professional debut on 7 April 2007 in Walsall"s Football League Two clash with Torquay United. The centre half came on as a 70th-minute substitute in this game replacing Craig Pead.
Smith started the 2007-2008 campaign in high spirit after making his debut in the previous season, the he had also just signed another contract with the club in May 2007, meaning he would remain at the Bescot Stadium until May 2008. This would prove to be a difficult season for him, especially if he wanted to climb back up the ladder and break back into the first-team
However, during the start of the season he failed to do so spending a lot of time playing in the reserve side.
Despite the summer departure of fellow centre half Ian Roper, Smith remained as only the third choice centre half due to the arrival of Stephen Roberts from Doncaster Rovers. He signed a new two-year contract with the club on 10 May 2010. In February 2012, Manny was disciplined by the club for his offensive tweet to a lifelong supporter.
N ottinghamshire County
O 9 July 2012, Smith signed a two-year deal with League One side N ottinghamshire County.
He played his first competitive game for the club in a League Cup match against Bradford City. However he was stretchered off in the first half after twisting his knee in a challenge with Alan Connell, it was later confirmed by Keith Curle that Smith would be out for 3 months
Wrexham
On 5 August 2014, he signed with Conference Premier side Wrexham.
The 25-year-old centre-back joined the Dragons on a one-year deal after impressing on trial. Smith signed a new one-year deal with Wrexham after the 2014-2015 season, keeping him at the Red Dragons for the 2015-2016 season.
He played in his 100th career appearance for Wrexham, as the beat Cross-border rivals Chester, 3-0 at the Racecourse.