It doesn't take a genius to work out what attracted Leyton Orient to new head coach Steve Davis.

The 51-year-old, sacked by Crewe in January, oversaw six years at Gresty Road, keeping the Railwaymen in League 1 for four years despite seeing some of his best talent, largely developed by the club, sold on.

Given the youth of much of Orient's squad, and the promise of many of the youngsters who played such a large part in their battle against the drop last season, Davis may be the ideal figure to help them progress their careers at Brisbane Road.

Here are five of the brightest talents he helped develop at Crewe, with some big destinations for the young footballers:

1) Nick Powell - sold to Manchester United in 2012

The young striker was one of Sir Alex Ferguson's final signings at Old Trafford, catching the eye of the United scouts after scoring 14 goals in 38 games for Crewe during Davis' first season.

He netted the Young Player of the Month award for the whole of the Football League in December 2011, and would have done well to buy a new trophy cabinet after picking up all five of Crewe's end-of-season awards, including Goal of the Season.

After making a £4million move, his failure to make a breakthrough in Manchester coincided with the Red Devils' fall from grace following Ferguson's retirement, and he spent last season at now League 1 Wigan.

2) Ashley Westwood - sold to Aston Villa in 2012

A difficult summer at Gresty Road, on the back of Crewe's promotion from League 2, continued when Westwood departed for the Midlands.

He played all but five of Crewe's games in their play-off winning campaign, and was named captain by Davis in the weeks prior to his transfer, for an eventual £2million.

The midfielder was still only 22 when he swapped Gresty Road for Villa Park, but went on to make 124 Premier League appearances for the Villians, and is now back in the top flight with Burnley.

3) Luke Murphy - sold to Leeds in 2013

Once Westwood had gone, Davis appointed Murphy his captain for the Alex's first League 1 campaign under his management.

Unfortunately, the armband again proved the kiss of death and within a year he had left for Leeds United, in a deal worth around £1million.

Murphy enjoyed his most profitable seasons under Davis, scoring 14 times in the two seasons the pair worked together, and forming an instrumental part of their midfielder.

4) Max Clayton - sold to Bolton in 2014

An England Under-19 international during Davis' tenure, Clayton was one to make his breakthrough under the new O's boss, making 72 of his 74 league appearances for Crewe while he was in charge.

Only 17 when he became a regular first-teamer, Clayton scored in the Football League Trophy triumph in 2013, but barely a year later left for Bolton Wanderers with a tribunal charging the Trotters £300,000 for the out-of-contract youngster.

Since then, injury troubles have plagued the 22-year-old, and he signed for newly promoted Blackpool on a free transfer last week.

5) Shaun Miller - joined Sheffield United in 2012

One player to spend more time than the others at Gresty Road, Miller was 24 before he left Crewe for pastures new.

Five goals in 33 games in his only season under Davis wasn't the best, but still enough to earn him a move on a free transfer to Sheffield United the following summer.