Sunderland have signed three new players so far this summer. Kristjaan Speakman has bolstered the Sunderland first-team squad with some much-needed Championship experience this summer. Simon Moore and Alan Browne were the first two signings before Sunderland signed Ian Poveda following his Leeds United release earlier in the summer. The trio, Browne in particular, add Championship experience and expertise to the Sunderland ranks, which is something Michael Beale and Mike Dodds said the side lacked last time round. Now, the challenge is finding a new striker, with Sunderland target Alexandre Me…