Carlos Edwards has warned Sunderland that they must find their form 'sooner rather than later'.
The Black Cats slipped to a third successive defeat at the Stadium of Light on Sunday as West Ham left with the points courtesy of Valon Behrami's 20th-minute strike.
Roy Keane's men, who won the Championship in 2007, now sit 16th in the table, two points above the relegation zone, and Edwards is concerned.
The winger said: "We played some good football at times, but I didn't think we deserved to get anything from the game.
"They took their chance and we didn't, so we get zilch. We are scrapping for points and we gave away three of them.
"There is still a lot more to come from the guys and hopefully it comes sooner rather than later so we can go on the run we really need."
But the Trinidad & Tobago international is pleased to be back at Sunderland after being recalled from a loan spell with Wolves ahead of schedule.
"Being back here is absolutely wonderful for me, and seeing the manager still has me in his plans," he added.
"I really hope Wolves continue on a positive course, but this is my club - it's where I want to be. I was only on loan to get my sharpness, and now the manager has seen fit to bring me back.
"If he didn't need me, he might have left me there for the duration of the loan. It was a surprise to get the call to come back. I have missed it here.
"I needed to go away to get the fitness and sharpness that I was lacking in pre-season.
"I have a point to prove this time round. I was lacking in my performances. I'm back here and raring to go."