Leigh Griffiths has been sensational for the Scottish Premiership side this season but Walker is concerned about the lack of depth.
Newcastle United are set to be relegated if Sunderland beat Everton in midweek.
Tottenham defender Toby Alderweireld capped off a fine season with two awards.
Queens Park Rangers released Alejandro Faurlin and six other players today.
Sheyi Ojo and Jordon Ibe have both been getting first-team opportunities lately.
Gary Rowett's men finished the season 10th in the Championship.
The Baggies manager believes Salomon Rondon will be a different proposition next season after taking time to adjust to life in England.
Mauricio Pochettino's men's three-game winless run has seen them come under pressure for second spot in the Premier League.
The Magpies midfielder admits he "can't really answer" why his side were so lacklustre in their vital clash at Villa Park.
Celtic have disappointed their fans this season, despite winning their obligatory league title.
Centerview Partners hired Stuart Smith as a partner in the health-care team from Credit Suisse, according to people familiar with the matter.
In less than seven days, hedge funds have been subject to a three-pronged attack by some of the biggest names in finance.
Credit Suisse’s shareholders should reject the bank’s pay proposals, Swiss remuneration crusader Thomas Minder said at the annual general meeting in Zurich on Friday.