West Ham brought in two players in the January transfer window.
Merson said: “I do like Sam Byram, I think he's good for the future and he has come in at a good time with the injury to Carl Jenkinson. I'll give them a B+ because they've brought in a couple of solid players.”
The Hammers brought in two players throughout January, signing Sam Byram from Leeds United and Emmanuel Emenike on loan from Fenerbahce.
Slaven Bilic took his time to assess where he needed to improve his squad, and his signings make logical sense.
Byram arrived as the long-term right-back for West Ham, although he has been thrust into the first-team straight away due to the injury to Carl Jenkinson.
At the age of 22, Byram can be a top level player for the next decade, and he arrived when his value made him a no-risk signing.
Emenike came in on loan until the end of the season, with Bilic currently struggling to find a fix for the injury troubles affecting West Ham.
Diafra Sakho and Andy Carroll are both out of action, whilst Nikica Jelavic is not good enough, meaning Enner Valencia has had to take all the pressure to score goals.
He has done his job well, but a new forward ensures the attacking pressure is spread around, and Emenike is a short-term fix, with the option to bring him in permanently at the end of the season should he impress.