UNITED STATES
                                SECURITIES AND EXCHANGE COMMISSION
                                             WASHINGTON, D.C. 20549


     DIVISION OF
CORPORATION FINANCE


                                                              April 19, 2019

  Via E-Mail

  Dennis J. Block
  Greenberg Traurig LLP
  MetLife Building
  200 Park Avenue
  New York, New York 10166

          Re:     Mack-Cali Realty Corporation
                  PRE 14A filed on April 12, 2019
                  DEFA14A filed April 16, 2019
                  DEFA14A filed March 18, 2019
                  File No. 1-13274

  Dear Mr. Block:

          The staff in the Office of Mergers and Acquisitions in the Division
of Corporation
  Finance has conducted a limited review of the filing listed above and have
the following
  comments. In some of our comments, we may ask you to provide us with
information so we may
  better understand your disclosure.

         Please respond to this letter by revising your proxy statement, by
providing the requested
  information, or by advising us when you will provide the requested response.
If you do not
  believe our comments apply to your facts and circumstances or do not believe
an amendment is
  appropriate, please tell us why in your response.

         After reviewing any amendment to your filing and the information you
provide in
  response to these comments, we may have additional comments. All defined
terms used here
  have the same meaning as in your proxy statement, unless otherwise indicated.

  Preliminary Proxy Statement filed on April 14, 2019

      1. Since this is a contested solicitation involving a director election
contest, the correct
         EDGAR "tag" is PREC14A. Please revise in your next filing of the
amended preliminary
         proxy statement.

  Background of the Solicitation, page 7

      2. Update the Background section to reflect the contents of the letter to
shareholders/press
         release issued on April 16, 2019, wherein you again express your
willingness to appoint
         two Bow Street nominees to the Board of Directors to end the proxy
contest. We further
 Dennis J. Block, Esq.
Greenberg Traurig LLP
April 19, 2019
Page 2

       note that this press release contains many statements of opinion which
are characterized
       as facts. Please avoid similar statements in future soliciting
materials, including but not
       limited to your revised proxy statement (express them as opinions or
beliefs, with
       appropriate support where necessary).

Proposal No. 1   Election of Directors, page 13

   3. We note that in February 2019, after receiving an indication of interest
from Bow Street
      and its affiliates, the Board of Directors voted to increase the size of
the Board from ten
      to eleven members. Explain why the Board did so, including the timing of
this action.

       We remind you that the filing persons are responsible for the accuracy
and adequacy of
their disclosures, notwithstanding any review, comments, action or absence of
action by the staff.

       Please direct any questions to me at (202) 551-3263.


                                                             Sincerely,


                                                             /s/ Christina
Chalk


                                                             Christina Chalk
                                                             Senior Special
Counsel
                                                             Office of Mergers
and Acquisitions