Please note that Mommsen uses the AUC chronology (Ab Urbe Condita), i.e. from the founding of the City of Rome. You can use this reference table to have the B.C. dates
From: The History of Rome, by Theodor Mommsen
Translated with the sanction of the author by William Purdie Dickson
This objection was very probably groundless; Marius showed at least his bodily vigour by appearing daily in the circus at Rome, and even as commander-in-chief he seems to have displayed on the whole his old ability in the last campaign; but he had not achieved the brilliant successes by which alone after his political bankruptcy he could have rehabilitated himself in public opinion, and so the celebrated champion was to his bitter vexation now, even as an officer, unceremoniously laid aside as useless.
The place of Marius in the Marsian army was taken by the consul of this year, Lucius Porcius Cato, who had fought with distinction in Etruria, and that of Caesar in the Campanian army by his lieutenant, Lucius Sulla, to whom were due some of the most material successes of the previous campaign; Gnaeus Strabo retained-- now as consul--the command which he had held so successfully in the Picenian territory.
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Reference address : https://www.ellopos.net/elpenor/rome/4-07-sulpician-revolution.asp?pg=43