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.
Ken Livingstone has said he will use a 1983 book by an American Marxist to defend himself against accusations of antisemitism and bringing the Labour party into disrepute.
Jeremy Corbyn has set up an independent inquiry into antisemitism within Labour as he battles to assert control over a party in turmoil on the eve of crucial local elections.
There is nothing like coming in to a home grand prix on the back of a podium from an adrenaline-fuelled race, while carrying the edge from a spat with a four-times world champion.